solid ammonium phosphate is slowly added to 175 ml of a aluminum iodide solution until the concentration of phosphate ion is 0.0695 m. the maximum amount of aluminum ion remaining in solution is m.

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Answer 1

The balanced chemical equation for the reaction between ammonium phosphate and aluminum iodide is: the maximum amount of aluminum ion remaining in solution is 0.139 M.

([tex]NH_{4}[/tex])[tex]3PO_{4}[/tex](aq) + 3 [tex]AlI_{3}[/tex] (aq) → 3 [tex]NH_{4}[/tex]I (aq) + [tex]AlPO_{4}[/tex] (s)

We know that solid ammonium phosphate is slowly added to 175 ml of an aluminum iodide solution, and the concentration of phosphate ion is 0.0695 M at equilibrium. This means that the equilibrium concentration of phosphate ion ([[tex]PO4^{3-}[/tex]]) is 0.0695 M.

Let's assume that x mol of [tex]Al^{3+}[/tex] ions react with the phosphate ions to form [tex]AlPO_{4}[/tex](s) and hence x mol of [tex]Al^{3+}[/tex] ions are removed from the solution. As a result, the concentration of [tex]Al^{3+}[/tex] ions at equilibrium is [[tex]Al^{3+}[/tex]] = (initial concentration of [tex]Al^{3+}[/tex]+ ions) - x.

Since 3 moles of [tex]Al^{3+}[/tex] ions react with 1 mole of [tex]PO4^{3-}[/tex] ions, we can say that the initial concentration of [tex]Al^{3+}[/tex] ions is three times the concentration of phosphate ion. Therefore, the initial concentration of [tex]Al^{3+}[/tex] ions is:

[[tex]Al^{3+}[/tex]]_initial = 3 × [[tex]PO4^{3-}[/tex]]_equilibrium = 3 × 0.0695 M = 0.2085 M

Thus, at equilibrium, we have:

[[tex]Al^{3+}[/tex]] = [[tex]Al^{3+}[/tex]]_initial - x = 0.2085 M - x

The equilibrium concentration of [tex]PO4^{3-}[/tex] ions is given as 0.0695 M. This means that x moles of [tex]Al^{3+}[/tex] ions have reacted with [tex]PO4^{3-}[/tex] ions to form [tex]AlPO_{4}[/tex](s). As a result, the maximum amount of [tex]Al^{3+}[/tex] ions remaining in solution is:

[[tex]Al^{3+}[/tex]] = 0.2085 M - x = 0.2085 M - 0.0695 M = 0.139 M

Therefore, the maximum amount of aluminum ion remaining in solution is 0.139 M.

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Related Questions

draw all stereoisomers of the given compound. how many stereoisomers are there, in total?

Answers

The number of stereoisomers for a molecule with two stereocenters should be four. The number of stereoisomers that can exist for a molecule with three stereocenters should not exceed eight.

Because n is the number of chiral centres, the maximum number of stereoisomers for a given constitution is 2n. Enantiomers and diastereomers are the two types of stereoisomers that exist. There are four stereoisomers of the chemical total in this instance, but since one of them is a meso compound, the right response is three. There can be a maximum of two stereoisomers of the atom M. They are a pair of enantiomers.

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How many stereoisomers are possible for given compound?

. When comparing the strength of binary acids, HX and HY, X and Y can be in either the same GROUP of the periodic table or the same PERIOD. Which applies to each of the following pairs? HF and HI H2S and HCI i. Based on which you know to be the strong acid in each pair, deduce the rules for how BINARY ACID strength changes across a period or down a group. ii. Given that HCIO4 is a strong acid, but HBrO4 and HCIOs are weak acids, state two important factors in determining the strength of an OXY-ACID, and what changes in each factor result in a stronger acid. Based on your reasoning in i and ii regarding periodic trends in acid strength, rank the following compounds in order of INCREASING acidity based on their structure. If you rank 2 as similar (based on structure), what other information could help determine the stronger one? a. HF, HCl, H2O, H2S, b. HCIO, HBrO, HCIO c. FCH CO H, FCHCO H, F,CCOH (Challenge-think about the reason behind all this)

Answers

HF and HI are in the same period, while H2S and HCl are in the same group. HF is the stronger acid in the first pair, while HCl is the stronger acid in the second pair.

i. Across a period, binary acid strength increases from left to right, as the electronegativity of the non-metal increases, resulting in a stronger bond with hydrogen. Down a group, binary acid strength increases from top to bottom, as the size of the non-metal increases, resulting in a weaker bond with hydrogen
ii. Two important factors in determining the strength of an oxy-acid are the electronegativity of the central atom and the number of oxygen atoms attached to it. As electronegativity increases, the acidity increases, as does the number of oxygen atoms attached to the central atom.
Based on the periodic trends in acid strength, the compounds can be ranked as follows:
a. H2O < H2S < HCl < HF
b. HBrO < HCIO < HCIO4
c. FCHCOH < FCHCOH2 < FCCOH
The reason for these trends is that electronegativity and size of the non-metal, as well as the electronegativity and number of oxygen atoms in oxy-acids, all contribute to the strength of the acid. If two compounds have similar structures, their acidity can be further compared based on other factors such as bond strength or resonance stabilization.

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What is the major monobromination product formed by heating each alkane with Br2?(CH3)3 CCH2, CH(CH3)2 rightarrow

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When heated with Br2, the major monobromination product of (CH3)3CCH2 is (CH3)3CBr, while the major monobromination product of CH(CH3)2 is CH2Br(CH3)2.

It is important to note that the degree of substitution on the alkane affects the selectivity of the reaction, as more substituted carbons are less likely to undergo monobromination.

The major monobromination product formed by heating each alkane with Br2 is the result of the substitution of one hydrogen atom in the alkane with a bromine atom. For the given alkane, (CH3)3CCH2CH(CH3)2, the most stable carbon-centered radical will form during the reaction, which corresponds to the tertiary carbon.

So, the major monobromination product would be: (CH3)3CCH(Br)CH(CH3)2.

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When heated with Br2, the major monobromination product of (CH3)3CCH2 is (CH3)3CBr, while the major monobromination product of CH(CH3)2 is CH2Br(CH3)2.

It is important to note that the degree of substitution on the alkane affects the selectivity of the reaction, as more substituted carbons are less likely to undergo monobromination.

The major monobromination product formed by heating each alkane with Br2 is the result of the substitution of one hydrogen atom in the alkane with a bromine atom. For the given alkane, (CH3)3CCH2CH(CH3)2, the most stable carbon-centered radical will form during the reaction, which corresponds to the tertiary carbon.

So, the major monobromination product would be: (CH3)3CCH(Br)CH(CH3)2.

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given the following free energies of formation: c2h2(g), δGf° = 209.2 kj/mol c2h6(g), δGf°= –32.85 kj/mol Calculate Kp at 298 K for C2H2(g) + 2H2(g) ⇄ C2H6(g)A. 97.7B. 1.10C. 8.17 x 10^30D. 2.69 x 10^42

Answers

The correct answer for the given chemical equation is (B) 1.10.

Equilibrium constant:

The equilibrium constant (K) is a measure of the extent to which a chemical reaction reaches equilibrium. It is defined as the ratio of the product of the concentrations of the products raised to their stoichiometric coefficients, divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients, all at equilibrium.

The equilibrium constant (Kp) can be calculated using the equation:

ΔG° = -RT ln Kp

where ΔG° is the standard free energy change for the reaction, R is the gas constant (8.314 J/mol·K), T is the temperature in kelvin (298 K), and ln is the natural logarithm.

The standard free energy change for the reaction can be calculated using the free energies of formation of the reactants and products:

ΔG° = ΣnΔGf°(products) - ΣnΔGf°(reactants)

ΔG° = (1 mol)(-32.85 kJ/mol) - (1 mol)(209.2 kJ/mol) + (1 mol)(2 x 0 kJ/mol)

ΔG° = -242.9 kJ/mol

Now, substituting the values in the equation for Kp:

-ΔG° / RT = ln Kp

-(242900 J/mol) / ((8.314 J/mol·K)(298 K)) = ln Kp

ln Kp = -32.01

Kp = [tex]e^{-32.01}[/tex] = 1.10 x [tex]10^{-14}[/tex]

Therefore, the answer is (B) 1.10.

What is energy an formation?

The energy of formation (ΔHf°) is the enthalpy change that occurs when one mole of a compound is formed from its constituent elements in their standard states (i.e., the most stable form of the element at a given temperature and pressure). The standard state of an element is defined as its most stable form at 1 atmosphere pressure and a specified temperature (usually 25°C or 298 K).

The energy of formation is a thermodynamic property that provides information about the stability and reactivity of a compound. The energy of formation is usually reported in units of kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol).

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The correct answer for the given chemical equation is (B) 1.10.

Equilibrium constant:

The equilibrium constant (K) is a measure of the extent to which a chemical reaction reaches equilibrium. It is defined as the ratio of the product of the concentrations of the products raised to their stoichiometric coefficients, divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients, all at equilibrium.

The equilibrium constant (Kp) can be calculated using the equation:

ΔG° = -RT ln Kp

where ΔG° is the standard free energy change for the reaction, R is the gas constant (8.314 J/mol·K), T is the temperature in kelvin (298 K), and ln is the natural logarithm.

The standard free energy change for the reaction can be calculated using the free energies of formation of the reactants and products:

ΔG° = ΣnΔGf°(products) - ΣnΔGf°(reactants)

ΔG° = (1 mol)(-32.85 kJ/mol) - (1 mol)(209.2 kJ/mol) + (1 mol)(2 x 0 kJ/mol)

ΔG° = -242.9 kJ/mol

Now, substituting the values in the equation for Kp:

-ΔG° / RT = ln Kp

-(242900 J/mol) / ((8.314 J/mol·K)(298 K)) = ln Kp

ln Kp = -32.01

Kp = [tex]e^{-32.01}[/tex] = 1.10 x [tex]10^{-14}[/tex]

Therefore, the answer is (B) 1.10.

What is energy an formation?

The energy of formation (ΔHf°) is the enthalpy change that occurs when one mole of a compound is formed from its constituent elements in their standard states (i.e., the most stable form of the element at a given temperature and pressure). The standard state of an element is defined as its most stable form at 1 atmosphere pressure and a specified temperature (usually 25°C or 298 K).

The energy of formation is a thermodynamic property that provides information about the stability and reactivity of a compound. The energy of formation is usually reported in units of kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol).

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Air at 500 kPa and 400 K enters an adiabatic nozzle ai a velocity of 30 m/s and leaves at 300 kPa and 350 K. Using variable specific heals, determine (a) the isentropic efficiency. (b) the exit velocity, and (c) the entropy generation.

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(a) Isentropic efficiency: ~91.85%

(b) Exit velocity: ~651.27 m/s

(c) Entropy generation: ~0.0047 kJ/kg·K


(a) Calculate the actual enthalpy change (Δh_actual) using specific heat capacities (cp) at average temperatures (T1+T2)/2. Then, find the ideal enthalpy change (Δh_ideal) using isentropic relations. Divide Δh_ideal by Δh_actual to find the isentropic efficiency.

(b) Apply the energy conservation equation, considering only enthalpy and kinetic energy terms, to find the exit velocity.

(c) Calculate the entropy change (Δs) using specific heats (cp) and temperatures, and pressure ratios (P2/P1). Entropy generation can be determined by multiplying mass flow rate (m_dot) and Δs, but here we can assume unit mass flow rate (1 kg/s) to get the entropy generation directly.

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The following is the structure of acetic acid (vinegar). According to valence bond theory, what hybridizations would you predict for the indicated atoms?
i sp3;
ii sp2;
iii sp2

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In acetic acid (vinegar), the indicated atoms are as follows:

i) The central carbon atom in the carboxyl group (-COOH) is bonded to three other atoms and has one lone pair of electrons. Therefore, it undergoes sp3 hybridization.

ii) The carbon atom in the carbonyl group (-C=O) is bonded to three other atoms and has no lone pairs of electrons. Therefore, it undergoes sp2 hybridization.

iii) The oxygen atom in the hydroxyl group (-OH) is bonded to one other atom and has two lone pairs of electrons. Therefore, it undergoes sp2 hybridization.

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what is the coenzymatic function of tetrahydrofolate? transamination transfer of single carbon units retro-aldol cleavage racemization

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Tetrahydrofolate (THF) plays a crucial role in the transfer of single carbon units in various metabolic reactions. Its coenzymatic function involves carrying and transferring these single carbon units, such as methyl, methylene, and formyl groups, between different substrates.

As a coenzyme, THF participates in several essential processes including nucleotide synthesis (e.g., DNA and RNA), amino acid metabolism, and the conversion of homocysteine to methionine.

While the terms transamination, retro-aldol cleavage, and racemization are also related to various biochemical reactions, they do not specifically describe the coenzymatic function of tetrahydrofolate. Transamination refers to the transfer of an amino group from one molecule to another, retro-aldol cleavage is the breaking of a carbon-carbon bond in aldol compounds, and racemization is the process of interconversion between enantiomers (optical isomers) of a chiral molecule.

In summary, the coenzymatic function of tetrahydrofolate involves the transfer of single carbon units in a variety of important metabolic reactions.

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What is the pOH of a solution with an H+ ion concentration of 4.37e-3?

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Answer: The pOH of the solution is 11.64.

Explanation: The pH and pOH of a solution are related to the concentration of hydrogen ions ([H+]) and hydroxide ions ([OH-]) by the equation:

pH + pOH = 14

Therefore, we can first calculate the pH of the solution as follows:

pH = -log[H+]

pH = -log(4.37e-3)

pH = 2.36

Then, we can use the equation above to find the pOH:

pOH = 14 - pH

pOH = 14 - 2.36

pOH = 11.64

In the titration of 25.0 ml of 0.1 m ch3cooh with 0.1 m naoh, how is the ph calculated after 12.5 ml of titrant is added?

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The pH after adding 12.5 mL of 0.1 M NaOH to 25.0 mL of 0.1 M CH₃COOH is 4.76.

The pH after adding 12.5 ml of 0.1 M NaOH to 25.0 ml of 0.1 M CH₃COOH can be calculated using the Henderson-Hasselbalch equation.

The first step is to calculate the initial concentration of CH₃COOH in moles per liter (M). Since the volume of the solution is 25.0 mL, or 0.0250 L, and the concentration is 0.1 M, the initial number of moles of CH₃COOH is:

n(CH₃COOH) = V x C = 0.0250 L x 0.1 mol/L = 0.00250 mol

At the equivalence point, the number of moles of NaOH added will be equal to the number of moles of CH₃COOH initially present. Therefore, after adding 12.5 mL, or 0.0125 L, of 0.1 M NaOH, the remaining number of moles of CH₃COOH will be:

n(CH₃COOH) = 0.00250 mol - (0.0125 L x 0.1 mol/L) = 0.00125 mol

The concentration of CH₃COOH after adding 12.5 mL of NaOH is:

C(CH₃COOH) = n(CH₃COOH) / V = 0.00125 mol / 0.0125 L = 0.100 M

The pKa of acetic acid is 4.76, so the pH can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log([A-] / [HA])

where [A-] is the concentration of the acetate ion (CH₃COO⁻) and [HA] is the concentration of acetic acid (CH₃COOH).

At the equivalence point, half of the initial moles of CH₃COOH have been converted to CH₃COO⁻, so the concentration of each species is equal:

[A-] = [HA] = 0.100 M

Plugging in the values, we get:

pH = 4.76 + log(1) = 4.76.

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what is the photon energy of the yellow-orange light ( = 589 nm) produced by sodium vapor streetlights?

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The photon energy (E) of a light wave can be calculated using the formula: the photon energy of the yellow-orange light produced by sodium vapor streetlights is approximately [tex]3.37 x 10^{-19} J[/tex].

E = hc/λ

where h is the Planck constant, c is the speed of light, and λ is the wavelength of the light.

Substituting the values:

λ = 589 nm = [tex]589 x 10^{-9}[/tex] m

h = 6.626 x [tex]10^{-34}[/tex] J s

c = 3.0 x 10^8 m/s

E = (6.626 x [tex]10^{-34}[/tex] J s x 3.0 x [tex]10^{8}[/tex] m/s) / (589 x [tex]10^{-9}[/tex] m)

E = 3.37 x [tex]10^{-19}[/tex] J

Therefore, the photon energy of the yellow-orange light produced by sodium vapor streetlights is approximately 3.37 x [tex]10^{-19}[/tex] J

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If 0.327 g of an unknown metal completely reacts with 10.00 ml, of 1.00 M HCl according to Eq.2, calculate the molar mass of the unknown metal. Identify the metal from its molar mass. A. Calculate the moles of acid added to the beaker. B. Calculate the moles of metal that reacted with the moles of acid in 1A. C. Determine the molar mass of the metal. D. Identify the unknown metal. ___

Answers

0.0100 moles of acid were added to the beaker. 0.00500 moles of metal reacted with the acid. The molar mass of the metal is 65.4 g/mol. The unknown metal is most likely Zinc (Zn).

A. To calculate the moles of acid added to the beaker, we need to use the equation:

moles of acid = concentration of acid x volume of acid

Here, the concentration of acid is 1.00 M (given in the question) and the volume of acid is 10.00 ml (also given in the question). However, we need to convert the volume to liters to match the unit of concentration. So,

Volume of acid = 10.00 ml = 0.01000 L

Now, we can calculate the moles of acid:

moles of acid = 1.00 M x 0.01000 L = 0.0100 moles

Therefore, 0.0100 moles of acid were added to the beaker.

B. According to the equation given in the question (Eq.2), the reaction between the metal and HCl is:

Metal + 2HCl → MetalCl[tex]^{2}[/tex] + H[tex]^{2}[/tex]

From this equation, we can see that one mole of metal reacts with two moles of HCl. Therefore, the moles of metal that reacted with the moles of acid in part A can be calculated as:

moles of metal = 0.0100 moles of acid x (1 mole of metal/2 moles of acid) = 0.00500 moles

Therefore, 0.00500 moles of metal reacted with the acid.

C. To determine the molar mass of the metal, we can use the equation:

molar mass = mass of metal/moles of metal

From the question, we know that the mass of metal that reacted is 0.327 g (given in the question) and the moles of metal are 0.00500 moles (calculated in part B). Substituting these values in the equation, we get:

molar mass = 0.327 g/0.00500 mol = 65.4 g/mol

Therefore, the molar mass of the metal is 65.4 g/mol.

D. To identify the unknown metal, we need to compare its molar mass with the molar masses of known elements. From the periodic table, we see that the molar mass of the closest element to 65.4 g/mol is Zinc (Zn), which has a molar mass of 65.4 g/mol. Therefore, the unknown metal is most likely Zinc (Zn).

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what term describes the process when two liquids are completely soluble in each other in all proportions

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The process by which two liquids are fully answerable in all proportions is appertained to as Miscible liquids.

A homogeneous admixture is created when two liquids fully dissolve in each other. similar fluids are called miscible fluids.

Miscibility is the capability of two substances to blend fully and produce a homogenous admixture. The term is generally applied to liquids, but it can also be used to describe feasts and solids.

Miscible liquids can mix in any rate. This means that no matter how important of one liquid we mix with how important of the other, the result will always be homogeneous and free of meniscuses. The fractional distillation process separates them.

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for ascorbic acid, h2c6h6o6, ka1 = 8.0 x 10−5 and ka2 = 1.6 x 10−12. what is the ph of a solution formed by mixing 250 ml of 0.187 m nahc6h6o6 and 250 ml of 1.82 m na2c6h6o6?

Answers

Ascorbic acid ([tex]H_{2} C_{6} H_{6} O_{6}[/tex]) has two dissociable protons, which means it can act as a diprotic acid. The given Ka1 and Ka2 values are the acid dissociation constants for the first and second dissociations, respectively.

the pH of the solution formed by mixing 250 mL of 0.187 M [tex]NaHC_{6} H_{6} O_{6}[/tex] and 250 mL of 1.82 M [tex]Na_{2} C_{6} H_{6} O_{6}[/tex] is approximately 2.57.

We can start by finding the concentration of each species in the final solution after mixing the two solutions. We know that the volume of the final solution is 500 mL, and the moles of each species can be calculated using the following formulas:

moles of [tex]H_{2} C_{6} H_{6} O_{6}[/tex] = 0.187 mol/L x 0.250 L = 0.0468 mol

moles of [tex]NaH_{2} C_{6} H_{6} O_{6}[/tex] = 0.187 mol/L x 0.250 L = 0.0468 mol

moles of [tex]Na_{2} C_{6} H_{6} O_{6}[/tex] = 1.82 mol/L x 0.250 L = 0.455 mol

Assuming that all the [tex]H_{2} C_{6} H_{6} O_{6}[/tex] and [tex]NaH_{2} C_{6} H_{6} O_{6}[/tex] will dissociate, we can calculate the initial concentration of H+ ions using Ka1:

Ka1 = [[tex]H^{+}[/tex]][[tex]C_{6} H_{6} O_{6}^{-2}[/tex]]/[[tex]H_{2} C_{6} H_{6} O_{6}[/tex]]

[[tex]H_{2} C_{6} H_{6} O_{6}[/tex]] = [[tex]C_{6} H_{6} O_{6}^{-2}[/tex]] because it is a diprotic acid and the first dissociation is complete

Ka1 = [tex][H^{+} ]^2[/tex]/[[tex]C_{6} H_{6} O_{6}^{-2}[/tex]]

[[tex]H^{+}[/tex]] = sqrt(Ka1[[tex]C_{6} H_{6} O_{6}^{-2}[/tex]]) = sqrt(8.0 x [tex]10^-5[/tex] x 0.0936) = 0.0027 M

Next, we need to consider the second dissociation of the remaining [tex]H^{+}[/tex] ions, which can react with [tex]NaH_{2} C_{6} H_{6} O_{6}[/tex] and [tex]Na_{2} C_{6} H_{6} O_{6}[/tex] to form additional [tex]H_{2} C_{6} H_{6} O_{6}[/tex] and [tex]NaC_{6} H_{6} O_{-6}[/tex]. The concentration of [tex]H^{+}[/tex] ions from the second dissociation can be calculated using Ka2:

Ka2 = [[tex]H^{+}[/tex]][[tex]C_{6} H_{6} O_{6} ^{-3}[/tex]]/[[tex]HC_{6} H_{6} O_{6} ^{-2}[/tex]]

[[tex]H^{+}[/tex]] = Ka2[[tex]HC_{6} H_{6} O_{6} ^{-2}[/tex]]/[[tex]C_{6} H_{6} O_{6} ^{-3}[/tex]] = (1.6 x [tex]10^{-12}[/tex] x 0.0468)/0.0936 = 8.0 x [tex]10^{-13}[/tex] M

The total concentration of [tex]H^{+}[/tex] ions in the final solution is the sum of the initial [tex]H^{+}[/tex] concentration and the [tex]H^{+}[/tex] concentration from the second dissociation:

[[tex]H^{+}[/tex]]total = 0.0027 + 8.0 x [tex]10^{-13}[/tex] = 0.0027 M (to three significant figures)

Finally, we can calculate the pH of the solution using the formula:

pH = -log[[tex]H^{+}[/tex]]

pH = -log(0.0027) = 2.57 (to two decimal places)

Therefore, the pH of the solution formed by mixing 250 mL of 0.187 M [tex]NaHC_{6} H_{6} O_{6}[/tex] and 250 mL of 1.82 M [tex]Na_{2} C_{6} H_{6} O_{6}[/tex] is approximately 2.57.

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calculate the standard cell potential e^0 cell for the following reaction: 2ag cl2 --->2agcl e0 ag /ag = .80v, e0 cl2/cl- = 1.36 v

Answers

The standard cell potential for the given reaction is 0.56 V.

For calculating the standard cell potential (E° cell) for the given reaction, find the cathode and the anode half cells.

The given reaction is:
2Ag + Cl2 → 2AgCl

Here, the Cl2/Cl- half-reaction is the reduction (cathode), and the Ag+/Ag half-reaction is the oxidation (anode).

The two half-reactions can be written as;
Oxidation: Ag → Ag+ + e-
Reduction: Cl2 + 2e- → 2Cl-

To balance the half-reactions by multiplying them so that the number of electrons is equal:
Oxidation: 2(Ag → Ag+ + e-)
Reduction: 1(Cl2 + 2e- → 2Cl-)

The provided standard reduction potentials for both half-reactions:
1. E°(Ag+/Ag) = 0.80 V
2. E°(Cl2/Cl-) = 1.36 V


Now we can calculate the standard cell potential using the formula:
E° cell = E° cathode - E° anode
E° cell = 1.36 V - 0.80 V
E° cell = 0.56 V

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Given the following plot for the decomposition of N2O5, calculate the frequency factor (A):Y axis: ln kX axis: 1/t (K)The graph is a linear line.y= -12232x+30.863 R^2=1.000

Answers

The frequency factor (A) for the decomposition of N2O5 is 1.3 x 10^16 s^-1.

To calculate the frequency factor (A) for the decomposition of N2O5, we need to use the Arrhenius equation:

k = A * exp(-Ea/RT)

where k is the rate constant, A is the frequency factor, Ea is the activation energy, R is the gas constant (8.314 J/mol*K), and T is the temperature in Kelvin.

From the given plot, we have ln k on the Y axis and 1/t (K) on the X axis. We know that the slope of the linear line in this plot is equal to -Ea/R, so we can calculate Ea first:

slope = -Ea/R
-12232 = -Ea/8.314
Ea = 101609 J/mol

Now we can rearrange the Arrhenius equation to solve for the frequency factor (A):

ln k = ln A - Ea/RT

We can use any point on the linear line to solve for ln k and 1/t. Let's use the point (0.003333 K, 1.864) from the graph:

ln k = -12232 * 0.003333 + 30.863
ln k = -88.463

1/t = 0.003333 K^-1

Now we can substitute these values into the rearranged Arrhenius equation and solve for A:

-88.463 = ln A - (101609 J/mol) / (8.314 J/mol*K * 0.003333 K^-1)
-88.463 = ln A - 39137
ln A = 39048
A = exp(39048)
A = 1.3 x 10^16 s^-1

Thus, the frequency factor (A) for the decomposition of N2O5 is 1.3 x 10^16 s^-1.

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Calculate K for the reaction between glutamate and ammonia (The standard free energy change for the reaction is +142 kJ/mol Assume a temperature of 298 K) Express your answer using three significant figures. K324 10 Correct Part B The glutamate and ammonia reaction can couple with the hydrolysis of ATP (such as shown above Express your answer using three significant figures. what is for this coupled reaction ? AG 720 kJ Submit Previous Answers Request Answer 2 incorrect; Try Again: 3 attempts remaining Part C What is K for this coupled reaction Express your answer using three significant figures

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The equilibrium constant for the coupled reaction is 3.1 x 10^(-22). For the reaction between glutamate and ammonia: Glutamate + [tex]NH_{3}[/tex]⇌ Glutamine.

The standard free energy change (ΔG°) is given as +142 kJ/mol.

We can use the relationship between ΔG° and equilibrium constant (K) to solve for K:

ΔG° = -RT ln(K)

where R is the gas constant (8.314 J/K mol), T is the temperature in Kelvin (298 K), and ln is the natural logarithm.

Substituting the given values:

142,000 J/mol = -(8.314 J/K mol) x (298 K) x ln(K)

Solving for K:

ln(K) = -142,000 J/mol / (8.314 J/K mol x 298 K)

ln(K) = -63.06

K = e^(-63.06) = 5.5 x 10^(-28)

Thus, the equilibrium constant for the reaction between glutamate and ammonia is 5.5 x 10^(-28).

For the coupled reaction:

Glutamate + [tex]NH_{3}[/tex]+ ATP + [tex]H_{2} O[/tex] → Glutamine + ADP + Pi

The standard free energy change (ΔG°) for the coupled reaction can be calculated by summing the ΔG° values for the individual reactions:

ΔG° = ΔG°(glutamate + [tex]NH_{3}[/tex]→ glutamine) + ΔG°(ATP + [tex]H_{2}O[/tex]→ ADP + Pi)

ΔG° = 142 kJ/mol + (-30.5 kJ/mol)

ΔG° = 111.5 kJ/mol

To calculate the equilibrium constant (K) for the coupled reaction, we can use the same equation as before:

ΔG° = -RT ln(K)

Substituting the given values:

111,500 J/mol = -(8.314 J/K mol) x (298 K) x ln(K)

ln(K) = -111,500 J/mol / (8.314 J/K mol x 298 K)

ln(K) = -49.5

K = e^(-49.5) = 3.1 x 10^(-22)

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CHEM 112 Acid and base basics (adapted from Dr. Sushilla Knottenbelt) 1. Sodium azide, NaN3, is sometimes added to water to kill bacteria. Sodium salts are generally soluble, and hence when dissolved in water, Na+ and N3- ions are produced. Azide, N3-, acts as a base. 2. What is the conjugate acid of azide? b. While the balanced equation to show the reaction of azide with water. Label acid, base and conjugue acid and base Morular basis for acid strength 2.a. What is the difference between a strong acid and a weak acid? b. The following exercise asks to you to deduce the rules for acid strength by comparing similarities and differences between strong and weak acids. The strong acids are: HCI, HBr,HI, HNO, H2SO4 and HCIO. For the purposes of this course, assume ALL other acids are weak! i For naming purposes in CHEM 121, you divided all acids into 2 categories - binary acids and oxyacids. Classify each strong acid as binary or oxy.

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1. The conjugate acid of azide, N₃⁻, is hydrazoic acid, HN₃.

2.a. The difference between a strong acid and a weak acid lies in their ability to dissociate in water.

b. Strong acids have similar properties: they have high acidity, are very reactive, and completely dissociate in water.

c. The strong acids HCI, HBr, HI, and HCIO are binary acids, while HNO₃ and H₂SO₄ are oxyacids.

In the presence of water, the following reaction occurs: N₃⁻ + H₂O ↔ OH⁻ + HN₃. In this reaction, azide acts as a base, while water acts as an acid. The conjugate base of water, OH⁻, is formed, while the conjugate acid of azide, HN₃, is formed.

A strong acid completely dissociates in water, meaning that all of its molecules break apart into ions. A weak acid only partially dissociates, meaning that only some of its molecules break apart into ions.

Weak acids have lower acidity, are less reactive, and only partially dissociate in water. The rules for acid strength can be deduced from these similarities and differences. Strong acids are typically composed of a single element (e.g. HCl, HBr, HI) or contain multiple oxygens (e.g. HNO₃, H₂SO₄, HCIO). Weak acids typically contain one or more of the following elements: carbon, sulfur, or nitrogen. Additionally, the strength of an acid is related to the stability of its conjugate base: the weaker the acid, the stronger its conjugate base.

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1. The conjugate acid of azide, N₃⁻, is hydrazoic acid, HN₃.

2.a. The difference between a strong acid and a weak acid lies in their ability to dissociate in water.

b. Strong acids have similar properties: they have high acidity, are very reactive, and completely dissociate in water.

c. The strong acids HCI, HBr, HI, and HCIO are binary acids, while HNO₃ and H₂SO₄ are oxyacids.

In the presence of water, the following reaction occurs: N₃⁻ + H₂O ↔ OH⁻ + HN₃. In this reaction, azide acts as a base, while water acts as an acid. The conjugate base of water, OH⁻, is formed, while the conjugate acid of azide, HN₃, is formed.

A strong acid completely dissociates in water, meaning that all of its molecules break apart into ions. A weak acid only partially dissociates, meaning that only some of its molecules break apart into ions.

Weak acids have lower acidity, are less reactive, and only partially dissociate in water. The rules for acid strength can be deduced from these similarities and differences. Strong acids are typically composed of a single element (e.g. HCl, HBr, HI) or contain multiple oxygens (e.g. HNO₃, H₂SO₄, HCIO). Weak acids typically contain one or more of the following elements: carbon, sulfur, or nitrogen. Additionally, the strength of an acid is related to the stability of its conjugate base: the weaker the acid, the stronger its conjugate base.

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A single-step reaction has an activation energy of +14 kJ/mol and a net energy change of -53 kJ/mol Is this reaction: O endothermicO exothermicO isothermic O mesothermic

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A single-step reaction has an activation energy of +14 kJ/mol and a net energy change of -53 kJ/mol . This reaction is exothermic.

The type of reactions in which energy is released are called exothermic reactions. In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation. Such type of reactions have a negative value at the end of the reaction.  If net energy change is positive, then the chemical reaction is considered to be endothermic. This is because less energy is released when products are formed than the amount of energy that is required to break the reactants.

Since, in this question net energy change is given as -53KJ/mol, so it is an exothermic reaction.

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what is the net ionic equation for the following reaction that takes place in water? mg h2so4⟶mgso4 h2

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The net ionic equation for this reaction is: Mg(s) + H+(aq) + [tex]SO^{2-} _{4}[/tex] (aq) → MgSO4(aq) + [tex]H_{2}[/tex](g)

How to write a balanced ionic equation?


The solid magnesium (Mg) reacts with the aqueous sulfuric acid ([tex]H_{2}SO_{4}[/tex]) to form magnesium sulfate (MgSO4) and hydrogen gas (H2). In the net ionic equation, the spectator ions (which do not participate in the reaction) are removed, leaving only the ions involved in the reaction. The net ionic equation can be determined using the following steps:

1. Write the balanced molecular equation:
Mg (s) + [tex]H_{2}SO_{4}[/tex] (aq) → MgSO4 (aq) + H2 (g)

2. Write the balanced total ionic equation by breaking all soluble compounds into their respective ions:
Mg (s) + 2H+ (aq) + [tex]SO^{2-} _{4}[/tex](aq) → Mg^2+ (aq) + [tex]SO^{2-} _{4}[/tex] (aq) + [tex]H_{2}[/tex] (g)

3. Identify and cancel out the spectator ions that do not participate in the reaction:
In this case, the spectator ion is [tex]SO^{2-} _{4}[/tex] (aq).

4. Write the net ionic equation:
Mg (s) + 2H+ (aq) → Mg^2+ (aq) + [tex]H_{2}[/tex] (g)

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Starting from benzene and any other needed starting materials/ reagents, show how to make following compounds.1. o-bromonitrobenzene2. p-toluenesulfonic acid

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Benzene + CH3Cl/AlCl3 → Toluene AND Toluene + H2SO4/H3PO4 → p-toluenesulfonic acid the synthesis of o-bromonitrobenzene and p-toluenesulfonic acid starting from benzene.

1. To make o-bromonitrobenzene from benzene, you would need to first convert benzene to nitrobenzene by reacting it with nitric acid in the presence of sulfuric acid. This reaction is called nitration.

Once you have nitrobenzene, you can then react it with bromine in the presence of a catalyst such as iron or aluminum bromide to produce o-bromonitrobenzene. The reaction is called bromination.

Overall reaction:

Benzene + HNO3/H2SO4 → Nitrobenzene
Nitrobenzene + Br2/Fe or AlBr3 → o-bromonitrobenzene

2. To make p-toluenesulfonic acid from benzene, you would first need to convert benzene to toluene by reacting it with methyl chloride in the presence of a Lewis acid catalyst such as aluminum chloride. This reaction is called Friedel-Crafts alkylation.

Once you have toluene, you can then react it with sulfuric acid in the presence of a catalyst such as phosphoric acid to produce p-toluenesulfonic acid. The reaction is called sulfonation.

Overall reaction:

Benzene + CH3Cl/AlCl3 → Toluene
Toluene + H2SO4/H3PO4 → p-toluenesulfonic acid
the synthesis of o-bromonitrobenzene and p-toluenesulfonic acid starting from benzene.

1. To synthesize o-bromonitrobenzene:
Step 1: Nitration of benzene - Treat benzene with a mixture of concentrated nitric acid (HNO3) and concentrated sulfuric acid (H2SO4) to form nitrobenzene.
Step 2: Bromination of nitrobenzene - Treat nitrobenzene with bromine (Br2) in the presence of iron(III) bromide (FeBr3) as a catalyst to obtain o-bromonitrobenzene.

2. To synthesize p-toluenesulfonic acid:
Step 1: Friedel-Crafts alkylation - Treat benzene with methyl chloride (CH3Cl) in the presence of aluminum chloride (AlCl3) as a catalyst to form toluene.
Step 2: Sulfonation of toluene - Treat toluene with concentrated sulfuric acid (H2SO4) at high temperature (100-130°C) to obtain p-toluenesulfonic acid.


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Which of the following pairs of isostructural compounds are likely to undergo thermal decomposition at lower temperature? Give your reasoning. (a) MgCO3 and CaCO3 (decomposition products MO + CO2). (b) CsI3 and N(CH3)4I3 (both compounds contain the [I3]− anion; decomposition products MI + I2).

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The pair of isostructural compounds that is likely to undergo thermal decomposition at a lower temperature is (b)  [tex]CsI_{3}[/tex]  and [tex](NCH_{3})_{4}I_{3}[/tex] .

Which compounds form Isostructures at low temperatures?



(a)[tex]MgCO_{3}[/tex] and [tex]CaCO_{3}[/tex]both undergo thermal decomposition to produce MO + CO2. Comparing the two, [tex]MgCO_{3}[/tex] decomposes at a lower temperature (around 350°C) than [tex]CaCO_{3}[/tex] (which decomposes around 840°C). This is due to the smaller ionic radius and higher charge density of the [tex]Mg^{2+}[/tex] ion, which makes it easier to break the bonds with the [tex]CO_{3}^{2-}[/tex] anion.

(b) [tex]CsI_{3}[/tex] and [tex](NCH_{3})_{4}I_{3}[/tex]  both contain the [I3]− anion and decompose to produce MI + [tex]I_{2}[/tex] .  [tex]CsI_{3}[/tex] , a simple ionic compound, will have stronger ionic bonding compared to the ionic-covalent bonding in [tex](NCH_{3})_{4}I_{3}[/tex] , which involves the tetramethylammonium cation. As a result, [tex](NCH_{3})_{4}I_{3}[/tex]  will likely undergo thermal decomposition at a lower temperature than  [tex]CsI_{3}[/tex] .

In conclusion, comparing both pairs of isostructural compounds, [tex](NCH_{3})_{4}I_{3}[/tex] (from pair b) is likely to undergo thermal decomposition at the lowest temperature due to its weaker ionic-covalent bonding.

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what is the ground state term of fe(cn6)4-

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The ground state term of Fe(CN)6^4- is a quintet (5) configuration with a total orbital angular momentum quantum number (L) value of 2, represented by the term symbol 5D. This configuration is a result of the high-spin Fe^2+ ion with four unpaired electrons distributed among the d orbitals.

The ground state term of Fe(CN)6⁴⁻ is a configuration in which the central iron (Fe) atom is at its lowest energy level. In this complex, Fe is in the +2 oxidation state, which means it has lost two electrons compared to its neutral state. The ground state term for Fe in Fe(CN)6⁴⁻ is 5D, indicating a quintet (5) configuration with a total orbital angular momentum quantum number (L) value of 2, which is represented by the letter D. In Fe(CN)6^4-, the central iron (Fe) atom is in the +2 oxidation state, which means it has lost two electrons compared to its neutral state. The six cyanide (CN^-) ligands are negatively charged and each donate a lone pair of electrons to form coordinate covalent bonds with the Fe^2+ ion, resulting in an octahedral geometry. The ground state term of Fe(CN)6^4- is 5D, which indicates a quintet (5) configuration with a total orbital angular momentum quantum number (L) value of 2, represented by the letter D. The ground state term symbol is determined by the number of unpaired electrons and the value of L. In Fe(CN)6^4-, the Fe^2+ ion has four unpaired electrons, which gives it a high-spin configuration.

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what nuclide is produced when o- 15 decays by positron emission?

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The nuclide produced when O-15 decays by positron emission is N-15.

When O-15 (oxygen-15) undergoes positron emission, it loses a positive beta particle (positron). In this process, a proton in the nucleus is converted into a neutron, and a positron is emitted.

As a result, the atomic number (number of protons) decreases by 1, and the mass number (total number of protons and neutrons) remains the same. Oxygen-15 has an atomic number of 8 and a mass number of 15.

After positron emission, the new nuclide will have an atomic number of 7 (8 - 1) and a mass number of 15. This corresponds to nitrogen-15 (N-15), which is the nuclide produced in this decay process.

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A gas originally at 27 degree celsius and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11 degrees celsius. The new volume of the gas is?

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The new volume of the gas cooled at constant pressure until the temperature is 11°C is approximately 3.69 L.

To find the new volume of the gas, we can use Charles's Law, which states that the volume of a gas is directly proportional to its temperature, as long as the pressure and the amount of gas remain constant. The formula for Charles's Law is:

V₁/T₁ = V₂/T₂

where V₁ is the initial volume, T₁ is the initial temperature, V₂ is the final volume, and T₂ is the final temperature. We need to convert the temperatures to Kelvin first:

T₁ = 27°C + 273.15 = 300.15 K
T₂ = 11°C + 273.15 = 284.15 K

Now, we can plug the values into the formula:

(3.9 L) / (300.15 K) = V₂ / (284.15 K)

To find the new volume, V₂:

V₂ = (3.9 L) * (284.15 K) / (300.15 K) = 3.69 L

So, the new volume of the gas when it is cooled to 11°C at constant pressure is approximately 3.69 L.

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Serge completed an experiment similar to Part A. They made a cell with copper as the cathode (E°red= 0.34 V), and Metal X as the anode. The electrodes were submerged in solutions of their ions. What is the E°red of Metal X in Serge's cell if the E°cell was 1.025 V?

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The standard oxidation potential (E°ox) of Metal X in Serge's cell is -0.685 V.

What exactly are electrodes?

An electrode is an electrical conductor that can carry current into nonmetals and other poor conductors of electricity. An anode and a cathode are the two types of electrodes. The positively charged electrode is known as the anode, while the negatively charged electrode is known as the cathode.

The overall cell potential can be calculated as:

E°cell = E°reduction (cathode) - E°oxidation (anode)

E°reduction = standard reduction potentials of the cathode

E°oxidation = standard reduction potentials of the anode

Copper is the cathode in Serge's cell, and Metal X is the anode. As a result, the half-reactions that occur at the electrodes are:

Cathode (reduction): Cu^{2+}(aq) + 2e- → Cu(s) (E°red = 0.34 V)

Anode (oxidation): Metal X(s) → Xn+(aq) + ne- (E°ox)

The overall cell reaction is:

Cu^{2+}(aq) + Metal X(s) → Cu(s) + Xn+(aq) (E°cell = 1.025 V)

E°cell = E°reduction (cathode) - E°oxidation (anode)

1.025 V = 0.34 V - E°ox

E°ox = 0.34 V - 1.025 V

E°ox = -0.685 V

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The standard oxidation potential (E°ox) of Metal X in Serge's cell is -0.685 V.

What exactly are electrodes?

An electrode is an electrical conductor that can carry current into nonmetals and other poor conductors of electricity. An anode and a cathode are the two types of electrodes. The positively charged electrode is known as the anode, while the negatively charged electrode is known as the cathode.

The overall cell potential can be calculated as:

E°cell = E°reduction (cathode) - E°oxidation (anode)

E°reduction = standard reduction potentials of the cathode

E°oxidation = standard reduction potentials of the anode

Copper is the cathode in Serge's cell, and Metal X is the anode. As a result, the half-reactions that occur at the electrodes are:

Cathode (reduction): Cu^{2+}(aq) + 2e- → Cu(s) (E°red = 0.34 V)

Anode (oxidation): Metal X(s) → Xn+(aq) + ne- (E°ox)

The overall cell reaction is:

Cu^{2+}(aq) + Metal X(s) → Cu(s) + Xn+(aq) (E°cell = 1.025 V)

E°cell = E°reduction (cathode) - E°oxidation (anode)

1.025 V = 0.34 V - E°ox

E°ox = 0.34 V - 1.025 V

E°ox = -0.685 V

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Calculate the energy released in joules/mol when one mole of polonium-214 decays according to the equation21484 Po --> 21082 Pb + 42 HeAtomic masses: Pb-210 = 209.98284 amu,Pb-214 = 213.99519 amu, He-4 = 4.00260 amu.]A. 8.78 x 1014 J/molB. 7.2 x 1014 J/molC. 8.78 x 1011 J/molD. –9.75 x 10–3 J/molE.1.46 x 10–9 J/mol

Answers

The energy released in joules/mol when one mole of polonium-214 decays according to the equation21484 Po --> 21082 Pb + 42 HeAtomic masses: Pb-210 = 209.98284 amu,Pb-214 = 213.99519 amu, He-4 = 4.00260 amu.] the correct answer is C. 8.78 x 10^11 J/mol.

To calculate the energy released in joules/mol when one mole of polonium-214 decays, follow these steps:

1. Determine the mass difference between the reactants and products in the decay equation.
Mass difference = (Mass of Po-214) - (Mass of Pb-210 + Mass of He-4)
Mass difference = (213.99519 amu) - (209.98284 amu + 4.00260 amu)
Mass difference = 0.00975 amu

2. Convert the mass difference to energy using Einstein's equation (E = mc^2) and Avogadro's number.
Energy per atom = (0.00975 amu/atom) * (1.66054 x 10^-27 kg/amu) * (3.00 x 10^8 m/s)^2
Energy per atom = 1.46 x 10^-12 J/atom

3. Multiply the energy per atom by Avogadro's number to get the energy released per mole.
Energy per mole = (1.46 x 10^-12 J/atom) * (6.022 x 10^23 atoms/mol)
Energy per mole = 8.78 x 10^11 J/mol

So, the correct answer is C. 8.78 x 10^11 J/mol.

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Question 12.38 & 12.42 In each case tell which SN2 reaction will proceed faster. 1. The displacement by OH- on CH3CH2I in (a) ethanol or (b) dimethyl sulfoxide. a b 2. The displacement by I- on (a) CH3Cl or (b) CH3OTos. a b

Answers

The [tex]Cl- ion[/tex] is a weaker leaving group than [tex]TosO-[/tex], which means that it is easier to displace.

How  [tex]SN2[/tex] reaction will proceed faster?

The SN2 reaction of [tex]CH3CH2I[/tex] with [tex]OH-[/tex] will proceed faster in (b) dimethyl sulfoxide (DMSO) than in (a) ethanol.

This is because DMSO is a polar aprotic solvent, which means it doesn't have an acidic proton to donate, and its polar nature facilitates the solvation of the ions.

This promotes the nucleophilicity of the [tex]OH-[/tex] ion, making it a stronger nucleophile and increasing the rate of the [tex]SN2[/tex] reaction.

In the second case, the [tex]SN2[/tex] reaction of I- with (a) [tex]CH3Cl[/tex] will proceed faster than with (b) [tex]CH3OT[/tex]os.

This is because [tex]CH3Cl[/tex] is a primary alkyl halide, which means it has a less hindered carbon atom and is therefore more susceptible to nucleophilic attack.

Additionally, the [tex]Cl- ion[/tex] is a weaker leaving group than Tos[tex]O-[/tex], which means that it is easier to displace.

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what is the bond order of the no bonds in the nitrite ion? draw the lewis structure for the nitrite ion. enter a decimal number to 2 decimal places such as 1.25 or 1.50, etc

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The bond order of the NO bonds in the nitrite ion is 1.5. The Lewis structure for NO[tex]^{2}[/tex]- is: O=N-O-

To draw the Lewis structure for the nitrite ion, we first need to know its molecular formula, which is NO[tex]^{2}[/tex]-.

To draw the Lewis structure, we start by placing the atoms in a way that satisfies the octet rule. Nitrogen has 5 valence electrons and Oxygen has 6. So, nitrogen will form a double bond with one of the oxygen atoms, leaving each atom with 8 electrons. The second oxygen atom will form a single bond with the nitrogen atom, also leaving each atom with 8 electrons. The Lewis structure for NO[tex]^{2}[/tex]- is:

O=N-O-

To calculate the bond order, we need to count the number of bonds between the atoms and divide by the number of bonding groups. In this case, there are two bonding groups (one double bond and one single bond) and three atoms. Therefore, the bond order is:

Bond order = (number of bonds) / (number of bonding groups) = 3 / 2 = 1.5

So, the bond order of the NO bonds in the nitrite ion is 1.5.

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Identify the solute and solvent in each solution. (a) 80-proof vodka (40% ethyl alcohol) (b) oxygenated water (c) antifreeze (ethylene glycol and water)

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The solute and solvent in each solution are: a) In 80-proof vodka, the solute is ethyl alcohol and the solvent is water. (b) In oxygenated water, the solute is oxygen and the solvent is water. (c) In antifreeze, the solute is ethylene glycol and the solvent is water.

A solute in any form, i.e. liquid, solid, or gas, is dissolved by a solvent to form a solution. A solvent is defined as a substance that dissolves the solute. It is ordinarily a liquid.

(a) In 80-proof vodka (40% ethyl alcohol), the solute is ethyl alcohol and the solvent is water.
(b) In oxygenated water, the solute is oxygen gas and the solvent is water.
(c) In antifreeze (ethylene glycol and water), the solute is ethylene glycol and the solvent is water.

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Angelas favorite bike begins to rust. The rust is an example of which of the following

Answers

Answer:

Chemical change​

Explanation:

Usually when something is left for a while unused and not cared for it begins to have a chemical change and this chemical change shows rust.

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true or false industries characterized by incumbent firms with high economies of scale typically attract more new entrants.' People who are made self-aware, by acting in front of a mirror or TV camera, have been found to A.) exhibit increased self-confidence. B.) behave more consistently with their attitudes. C.) be less thoughtful in analyzing complex social issues. D.) be more vulnerable to persuasive appeals that run counter to social norms. A theme park has a ride that is located in a sphere. The ride goes around the widest circle of the sphere which has a circumference of 527.52 yd. What is the surface area of the sphere? Is the following equation properly balanced?2HOI+H2OIO3 +I +4H+Prove your answer by balancing the equation by the method of half-reactions A piano has a ratio of 6 black keys for every 15 white keys. Write a ratio to represent the ratio of white keys to black keys. 15 to 6 six over fifteen 6:15 15:21 3.The conquest by which group allowed Jews to return to Judah?C. IsraelitesD. PersiansB.Babylonians What is the probability that it will land on tails twice and heads once? How many times the following loops iterate?int count=0;Do{ MessageBox.Show(count.ToString());Count++;} while(count What mass in grams of Na2S2O3 is needed to dissolve 4.7 g of AgBr in a solution volume of 1.0 L, given that Ksp for AgBr is 3.3 x 10^-13 and Kq for [Ag(S,O3)213- is 4.7 x 10^13? a random sample of 625 12-ounce cans of fruit nectar is drawn from among all cans produced in a run. prior experience has shown that the distribution of the contents has a mean of 12 ounces and a standard deviation of .12 ounce. what is the probability that the mean contents of the 625 sample cans is less than 11.994 ounces? a) 0.146 b) 0.116 c) 0.136 d) 0.106 e) 0.156 f) none of the above PLEASE HELP ME ASAPP!!! Let X be a random variable with the following probability distribution:x 2 3 5f(x) 0.3 0.2 0.5(a) Find the standard deviation of X. (b) Find the expected value of X^2. Round off your answer to four decimal places. Gretal invests 5000 at a rate of 2% per year compound interest calculate the value at the end of 3 years Manager's Hot Seat: A Sweet Strategy Strategic positioning attempts to achieve sustainable competitive advantage by preserving what is distinctive about a company. It means performing different activities from your rivals, or performing similar activities in a different way. A candy manufacturer named Sweet Tooth is facing declines in sales and executives are meeting to discuss the situation. Different strategies emerge, but the Chief Strategy Officer struggles with which one to pursue. How do you think he is handling the situation? How would you? consider the following reaction and its at 25.00 c. fe2 (aq) zn(s)fe(s) zn2 (aq)=60.73 kj/mol calculate the standard cell potential, cell, for the reaction. write the form of the partial fraction decomposition of the rational expression. do not solve for the constants. 7x 5 x/(x2 8)^2 Career clusters include Finance and Health Science. A. True B. False If nominal United States GDP in 2009 was $13,973 billion, what was the approximate spending-to-GDP ratio that year? a. 15%>b. 20%c. 25% d. 30% Suppose A = PDP-1 for square matrices P, D with D diagonal. Then, A^100 = PD^100P^-1. Select one: O True False change from rectangular to cylindrical coordinates. (let r 0 and 0 2.) (a) (5, 5, 3)(b) (4, 4sqrt(3), 1)