Answer:
0.800M
Explanation:
First, convert mL to liters:
25mL x 1L/1000mL = 0.025 L
Molarity means mol/L, so divide number of mol by L:
0.02mol/0.025L = 0.8M
Add decimal places:
0.800M
The molarity is an important method which is used to calculate the concentration of a solution. The molarity of 25 ml an acetic acid solution that contains 0.02 moles is 0.8 mol L⁻¹.
What is molarity?The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It can be represented as 'M' and the unit of molarity is mol L⁻¹. It is usually employed in a binary solution.
The equation used to calculate the molarity is:
Molarity = Number of moles of the solute / Volume of the solution in litres
Here number of moles = 0.02 moles
Here 1 L = 1000 mL
Volume = 25 ml = 0.025 L
M = 0.02 / 0.025
M = 0.8 mol L⁻¹
Thus the molarity of the solution is 0.8 mol L⁻¹.
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In naming a binary molecular compound,the number of atoms of each element present in the molecular is indicated by?
Using prefixes before the name of each element, the number of atoms of each element present in the molecular is indicated.
A prefix is placed before the name of the element when naming a binary compound to indicate how many atoms are present.For example:In carbon dioxide which is CO2 (prefix di- meaning 2)In carbon tetrachloride which is CCl4 (prefix tetra- meaning 4) In N2O5, the name is dinitrogen pentoxide (prefix di- and pent- meaning 2 and 5)It depends on the number of atoms present in a compound.A binary compound is a compound composed of two elements.To learn more about binary compounds visit:
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endotoxins are also known as endotoxins are also known as prostaglandins. lipid a. cytokines. interleukin-1.
Endotoxins are also known as: Lipid A. Because the lipid A portion of LPS is the cause of the endotoxin activity.
What are endotoxins and Lipid A?Lipid A is an endotoxin component responsible for the gram-negative bacteria’s toxicity. The lipid A is the innermost lipopolysaccharide (LPS) that is mainly known as an endotoxin molecule. Endotoxin is a toxin from bacterial cells causing diseases as it disrupts humoral and cellular mediation systems as it disintegrates. Exposure to endotoxin can cause chest tightness, fever, cough, shortness of breath, and wheezing. Hence, endotoxins are in fact lipid A.
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a sample of an ideal gas at 12.4 atm and 15.0 l is allowed to expand against a constant pressure 3.00 atm at a constant temperature. what is the work done (in kj) by the expanding gas?
A sample of an ideal gas at 12.4 atm and 15.0 l is allowed to expand against a constant pressure 3.00 atm at a constant temperature. -13.2kJ is the work done (in kj) by the expanding gas.
What is Constant temperature ?Since the heat energy created during a state change is used up by altering the state of matter as well as by breaking many bonds or attractive forces, the temperature of any substance stays constant during the process.
Isothermal processes are defined as those that occur at constant temperature. There are many isothermal processes that are used often. At constant temperatures, the working fluid undergoes a change in phase during the boiling and condensing processes.
That's right; using Boyle's Law to determine V2 requires P2, which is based on the constant external pressure of 2.00 atm.
But after that, you must look for a job. w= P(ΔV)
Constant pressure = 3.00 atm
Since the gas is releasing energy, our pressure is negative in this situation.
Consequently, w= -2.00atm*(65L)= -130Latm
But because the inquiry requests working in kJ, it must first be transformed to J before kJ.
-13.169J/1000J/kJ = -130L/atm (101.3J/L/atm)
So the final answer is -13.2kJ .
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draw all of the stereoisomers of 2-chloro-5-methylheptane. use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable.
The stereoisomers of 2-chloro-5-methyl heptane Iis in the 2 chloro 5 methyl hectare.
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism wherein molecules have an equal molecular method and series of bonded atoms, however, fluctuate inside the 3-dimensional orientations in their atoms in area.
Stereoisomers are isomers that fluctuate inside the spatial arrangement of atoms, in preference to the order of atomic connectivity. one in every of their most exciting sort of isomers is the replicate-image stereoisomer, a non-superimposable set of molecules that are a replicate image of one another. Stereoisomers are isomeric molecules with identical chemical formulas but exceptional atomic arrangements. for this reason, they own similar chemical and physical homes.
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the stanley miller apparatus demonstrated that organic molecules could assemble spontaneously in an environment lacking free oxygen and containing water, methane, and ammonia in the presence of an abundant energy source, such as an electric discharge. the research was considered supportive of the organic soup hypothesis, which states that the primitive atmosphere provided inorganic precursors from which organic molecules could have been synthesized in the presence of an energy source. based on subsequent research, the primordial atmosphere was determined to contain less methane and more carbon dioxide. the new data about the composition of the early atmosphere had which of the following effects on origin-of-life hypotheses?
The Stanley miller apparatus demonstrated , The new data about the composition of the early atmosphere had which of the following effects on origin-of-life hypotheses : A new organic soup hypothesis was proposed to account for the new data for the atmosphere.
The Stanley miller hypothesis proposed the evolution of life on the earth. from the several theories the acceptance is on soup theory. The organic soup theory proposed the new data for the atmosphere also called as primordial soup theory.
Thus, The Stanley miller apparatus demonstrated , The new data about the composition of the early atmosphere had which of the following effects on origin-of-life hypotheses : A new organic soup hypothesis was proposed to account for the new data for the atmosphere.
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Give a structural formula for the carbocation intermediate that leads to the major product in the reaction of hydrogen chloride with cis−2−butene.
The major product formed when hydrogen chloride reacts with 2−methyl−2−butene proceeds through a tertiary carbo cation intermediate.
An addition reaction occurs when 2 methyl 2 butene and hydrogen chloride are combined. The Markovnickov rule states that the carbon atom with the fewest hydrogen atoms receives the negative part of the addition. As a result, carbon 2 will be increased by the addendum's negative portion.
The carbocation will be carbon-2 as indicated in the figure that is linked to this answer since this reaction proceeds through an ionic mechanism. This carbon atom is the one to which chlorine will finally bond.
A chemical compound known as hydrogen chloride (HCl) contains a polar covalent bond between chlorine and hydrogen atoms.
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Vinegar solutions are often labeled as being 5% by mass "acidity. " assuming that the density of vinegar is equal to the density of water, calculate the molarity of "acidity" in the vinegar.
the molarity of "acidity" in the vinegar is 0.00386 .
What is molarity ?
Molarity (also called molarity, bulk concentration, or substance concentration) is a measure of the concentration of a chemical species, especially a solute, in solution, expressed as the amount of substance per unit volume of solution. In chemistry, the most commonly used unit of molarity is moles per liter, symbolized in SI units as mol/L or mol/dm3. A solution with a concentration of 1 mol/L is called 1 molar, commonly called 1 M.
Molarity or molarity is most commonly expressed in moles of solute per liter of solution. For broader use, it is defined as the amount of solute material per unit volume of solution, or per unit volume available to a species, and is expressed in lower case.
this %mass means:
basis --> 100 g of solution, then 5 g are vinegar
assume d = 1 g/ml then we have V = 100 ml of solution
m = 5 g of Acetic acid
MW of acteic Acid = 60
mole = mass/MW = 5/60 = 0.08333 mol of acetic acid
By definition
M = mol/V = 0.0833/0.1 = 0.8333 M of Acetic acid
Ka = 1.8*10^-5
Ka = [H+][A-]/[HA]
1.8*10^-5 = (x)(x) / (0.8333-x)
x = [h+]
solve for H+
[h+] = 0.00386
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11. Reactions of Ni(CO)4 in which phosphines or phosphites replace CO to give Ni(CO)3L occur at effectively the same rate for different phosphines or phosphites. Classify the substitution process and provide an explanation for your answer.
It is a dissociative substitution process.
Write the reaction mechanism
Step 1:
Ni(CO)₄ → Ni(CO)₃ + CO
Step 2:
Ni(CO)₃ + CO + L → [Ni(CO)₃L
In the first step of the reaction or in the rate-determining step nickel tetracarbonyl dissociates into nickel tricarbonyl and carbon mono oxide. As the first step is the rate-determining step in which dissociation occurs so it is a dissociative mechanism. In the second step phosphines and phosphites replace carbon monoxide at the same rate, in simple words this step is the same for different phosphines and phosphites. This is because it is an SN1 reaction so the second step does not affect the rate of reaction.
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predict the charge that an aluminum ion would have. question 10 options: a) 1 b) 5- c) 2 d) 3 e) 1-
An aluminum ion will have +3 charge.
The electronic configuration of Aluminum(Al) is 1s2 2s2 2p6 3s2 3p6. This shows that an aluminum has 3 shells from which the outermost shell contains 3 valence electrons. So, the Aluminum has the tendency to loose maximum 3 electrons which gives Al + charge called cation. The atomic number of Al is 13.
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Complete the mechanism for the acid‑catalyzed alcoholysis of the epoxide by adding any missing atoms, bonds, charges, nonbonding electrons, and curved arrows.
The lone pair electron in alcohol undergoes protonation and stabilizes the cation that is present in the oxygen atom. The final product contains both the ether and alcohol functional groups.
The chemical element with the letters O and the atomic number 8 is called oxygen atoms. It belongs to the chalcogen group of the periodic table and is a highly reactive nonmetal that readily forms oxides with most elements as well as with other compounds. Chemical elements, or substances with only one sort of atom, include molecular oxygen. An oxygen atom has eight protons in its nucleus, as indicated by its atomic number of 8 and the official chemical symbol O. The manufacture of steel, plastics, and textiles, brazing, welding, and cutting of steel and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight, and diving are just a few common uses for oxygen. Since many organisms use molecular oxygen for respiration, molecular oxygen is necessary for life.
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if 45.3 ml of a 0.108 m hcl solution is needed to neutralize a solution of koh, how many grams of koh must be present in the solution?
If 45.3 ml of a 0.108 M HCL solution is needed to neutralize a solution of KOH, then grams of KOH that must be present in the solution is 0.274gm.
What is molarity?The amount of a substance present in a certain volume of solution is termed as molarity . It can also be defined as the moles of a solute per liter of solution.
HCL +KOH ---> KCL+ H2O
Molarity= mol solute / L solution
Given volume of HCL= 45.3ml= 0.0453L
concentration = 0.108M
As we know that, No. of moles = concentration * Volume
=0.0453* 0.108
Number of moles=0.0048
Mass = no. of moles*molar mass
Molar mass of KOH = 56.1 g/mol
= 0.00489* 56.1
Grams of KOH= 0.274 gm.
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if you run the acetylation reaction (part 1) using the exact amounts described in the procedure, what is the limiting reagent?
A limiting reagent is one that is completely consumed during a reaction, hence restricting the product's yield. Compared to the limiting reagent, the other reactant(s) are present in excess.
The amount of product that could be produced based on the molar ratios is known as the theoretical yield. The amount that was actually retrieved is divided by the theoretical yield to determine the percent yield. For this amount to be expressed as a percentage, multiply it by 100.
What is Acetylation Reaction ?Acetylation is an organic esterification reaction using acetic acid in organic chemistry. It gives a chemical molecule an acetyl group. These substances are known as acetate esters or just acetates. The opposing reaction, deacetylation, involves removing an acetyl group from a chemical molecule.
Deacetylation is the removal of an acetyl group from an organic chemical molecule, whereas acetylation is the introduction of an acetyl functional group (acetoxy group, CH3CO) into an organic chemical compound, specifically the substitution of the acetyl group for a hydrogen atom.
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if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml iwth pure water, what isthe molarity of copper ii sulfate in the diluted soltuion
The molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.
What is Molarity?Molarity is defined as the ratio of moles of solute to the volume of solution.
Mathematically,
Molarity = moles of solute / volume of solution
Step 1 : Calculation of molesGiven,
Initial volume of CuSO4 = 4 ml = 4/1000 = 0.004 l
Molarity of CuSO4 = 0.0250 m
By substituting all the values, we get
0.025 = moles/ 0.004
moles = 0.025 × 0.004 = 0.000100 mol
Moles = 0.0001 mol.
Step 2 : Calculation of molarity of final volumeTotal volume = 0.004 l + 10 ml
= 0.004 + 0.001 = 0.005 l
Moles of CuSO4 = 0.0001 mol
Molarity = 0.0001 / 0.005 = 0.02 M
Thus, we concluded that the molarity of copper sulfate in the diluted solution if 4 ml of 0.0250 m cuso4 is diluted to 10.0 ml with pure water is 0.02M.
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Under what conditions of temperature and pressure would you expect gases to obey the ideal-gas equation?.
Gases obey the ideal-gas law at high temperatures and low pressures.
What is the ideal gas law?
The equation of state for a hypothetical ideal gas is known as the ideal gas law, sometimes known as the general gas equation. Although it has some restrictions, it is a good approximation of the behavior of numerous gases under various circumstances.
PV = nRT
where,
P = pressure
V = volume
n = amount of substance
R = ideal gas constant
T = temperature
Hence, the gases are expected to obey the ideal gas equation at low pressures and high temperatures.
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determine whether each of the following compounds is soluble or insoluble: drag the appropriate items to their respective bins. you did not open hints for this part. cu3(po4)2
Cu3(PO4)2 (Copper (11) Phosphate)
→ Inorganic compound.
→ It is cupric salt of phosphoric acid.
→ Insoluble in water and ethanol.
Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.
Solubility indicates the maximum amount of a substance that can be dissolved in a solvent at a specific temperature. Such a solution is called saturated. Solubility is the formation of new bonds between solute and solvent molecules. In terms of quantity, solubility is the maximum concentration of a solute that will dissolve in a solvent of known concentration at a given temperature.
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Which resource is a nonrenewable resource?
Responses
nuclear energy
nuclear energy
lumber
lumber
water power
water power
solar energy
solar energy
Write the electron configurations for the following ions using spectroscopic ( spdf) and orbital box notation. (a) Li+ Full electron configuration = (do not use noble gas notation) Orbital box notation: 1s 2s 2p 3s 3p 4s (b) V2+ Noble gas electron configuration = Orbital box notation: 4s 3d
The electron configuration for the following ions using full electronic configuration method is :
a) Li⁺ = 1s²
b) V²⁺ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³
1) the electronic configuration of Li , the full for , the atomic number is 3 is :
Li = 1s² 2s¹
Li⁺ means one electrons is remove from the last shell.
Li⁺ = 1s²
b) the electronic configuration of Vanadium with atomic number 23 is :
V = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³
V²⁺ means 2 electrons are remove from the last shell of the atom.
V²⁺ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³
Thus, The electron configuration for the following ions using full electronic configuration method is :
a) Li⁺ = 1s²
b) V²⁺ = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³
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Choose the statement that best completes the sentence.
Whether a substance is a gas, liquid, or solid is dependent on the natural attractive forces between molecules and
how the molecules collide with the container.
the collisions between the molecules.
the kinetic energy of the molecules
the extent of molecular motion as determined by the average KE and temperature.
none of the above
The statement that best completes the sentence "whether a substance is a gas, liquid, or solid is dependent on the natural attractive forces between molecules and" is: the kinetic energy of the molecules;
Hence, the correct option is D.
What are intermolecular forces?Intermolecular forces are forces of attraction that exist between molecules of the same substance that enable the substance to exist in different states of matter.
The stronger the intermolecular forces between the molecules of a substance, the more ordered the particles of the substance will be.
Hence, solids have the strongest intermolecular forces whereas gases have the weakest intermolecular forces.
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What is the name of the compound with the formula PI3 ?
Answer:
im pretty sure its Phosphorus triiodide
WILL MARK BRAINLIEST! 50 points! Can someone pls explain fully balancing chemical equations and how to do it. I’m so confused and I have a test on Friday.
Answer:
When you balance a chemical equation, you change (!!YOU MUST CHANGE IT DO NOT FORGET!!) coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (otherwise known as coefficients) to make sure that there are the same number of atoms on each side of the arrow.
For those of you who may not have a clear understand of what a coefficient is, here's a simple definition that you can look at. A coefficient can be simply explained a number or symbol by which another number or symbol (as a mathematical variable) is multiplied.
Also, here's a simple definition of a subscript! A subscript is a distinguishing symbol (such as a LETTER OR NUMERAL) written immediately above or below and to the right or left of another character.
Here's an example.
The equation that were trying to solve is:
Zn + 2HCl ---> ZnCl^2 + H^2
Answer:
There are two chlorines on the right but only one on the left, and the chlorine is in a single chemical species on each side. Put a 2 in front of the HCl on the left hand side.
Zn + 2HCl ---> ZnCl^2 + H^2
And if you look carefully, you will see that the equation is now balanced, with one Zn on each side, two hydrogens on each side and two chlorines on each side. Some examples can be rather easy!
Explanation:
Like always, don't have a good day, have a great day!
A student dissolves 13. g of stilbene (C14H12) in 100. mL of a solvent with a density of 0.85 g/mL. The student notices that the volume of the solvent does not change when the stilbene dissolves in it.
The molarity and molality of the student's Stilbene solution is 0.72 M and 0.85 m.
Molarity is calculated by the formula - number of moles of solute ÷ volume of solution in litres
Molality is calculated by the formula - number of moles of solute ÷ mass of solvent in kilograms
Molar mass of Stilbene = 180 gram/mole
Number of moles = mass ÷ molar mass
Number of moles = 13 ÷ 180
Performing division
Number of moles = 0.072 mol
Volume of solution= 100 ml
As per the fact, 1000 ml = 1 l
Volume = 0.1 l
Mass of solvent = volume × density
Mass of solvent = 100 × 0.85
Mass of solvent = 85 gm
1000 gm = 1 kg
85 gm = 0.085 kg
Molarity = 0.072/0.1
Molarity = 0.72 M
Molality = 0.072/0.085
Molality = 0.847 m
Molality = 0.85 m
Thus, the molarity and molality is 0.72 M and 0.85 m.
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The complete question is attached in the diagram.
what is the relationship between the kinetic energy of particles and the forces of attraction between particles
The relationship between the kinetic energy of particles and the forces of attraction between particles is that if average kinetic energy increases than the force of attraction then particles will not condensed to form liquid or solid.
If the kinetic energy less than force of attraction between the particle then the particles will tends to form solid or liquid. the kinetic energy is directly proportional to distance between the particles. The distance between the particles is inversely proportional to the intermolecular forces.
Thus, The relationship between the kinetic energy of particles and the forces of attraction between particles is that if average kinetic energy increases than the force of attraction then particles will not condensed to form liquid or solid.
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Why are the products of an exothermic reaction likely to be warmer than the reactants?.
If the energy produced in an exothermic reaction is released as heat, it results in a rise in temperature.
In exothermic reactions, more energy is launched while the bonds are shaped in the goods that are used to interrupt the bonds inside the reactants. Exothermic reactions are observed with the aid of a boom in the temperature of the reaction combination. If materials react and the temperature of the aggregate will increase, the reaction is exothermic.
A chemical response includes the breaking of bonds within the reactants and the forming of bonds in the goods. It takes power to break bonds. when strength is launched in an exothermic response, the temperature of the response mixture will increase. when electricity is absorbed in an endothermic reaction, the temperature decreases. you could monitor modifications in temperature by placing a thermometer inside the response aggregate.
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A sample of gas has a volurne of 215cm^(3) at 23.5\deg C and 84.6kPa. What volume will the gas occupy at STP?
The volume that a gas will occupy at a volume of 215cm³ and a temperature of 23.5°C is 0.165L.
How to calculate volume?
The volume of a given gas can be calculated using the combined gas law equation as follows:
P₁V₁/T₁ = P₂V₂/T₂
Where;
P₁, V₁ and T₁ are the initial pressure, volume and temperature respectively.P₂, V₂ and T₂ are the final pressure, volume and temperature respectively.At standard temperature and pressure (STP), the following applies;
P = 1atmT = 273K0.215 × 0.835/296.5 = 1 × V/273
0.0006055 × 273 = V
V = 0.165L
Therefore, 0.165L is the volume of the gas at STP.
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In the nineteenth century, this material became both less costly and more widely available for construction.
a. glass
b. iron
c. concrete
d. steel
e. all of the other answers
In the nineteenth century, this material became both less costly and more widely available for construction all of the other answers. Option E.
This historic Mycenaean stone building constructed around 1250 BCE, uses a corbeled arch to span the entryway. This architectural production technique includes two uprights and a crossbeam. A vault is an arched overhead shape that provides a space with a ceiling or roof just like the arch the vault has been around seeing ancient instances.
Set-up art is one of the most effective and immersive of all artwork paperwork. In comparison with conventional mediums along with painting and sculpture, set-up artwork is designed to fill complete rooms or maybe whole gallery spaces. however, it become the Romans who created a rigid stable structure that didn't need any external buttresses or help.
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In your lab, the mass of your product is less than the mass of your reactants. You recall that atoms are not created or destroyed in a chemical reaction, they are just rearranged from the reactants to form the products. You are afraid you have misunderstood something, so you ask your teacher for some help. She reminds you that if a chemical reaction is completed in a closed system then the mass will remain constant. But if the chemical reaction happens in an open system the mass may appear to change. What can account for this apparent difference?
A The chemical reaction is in a closed system and the reactants
are all solid, while the products are liquid.
B The chemical reaction is in an open system and the reactants
are all liquid, while the products are solid.
C The chemical reaction is in an open system and a gas is being
released into the atmosphere.
D The chemical reaction is in a closed system and a gas is being
used as a reactant.
As per the given statement the right answer is C, The chemical reaction is in an open system and a gas is being released into the atmosphere.
What is a chemical reaction?A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
Now ,The Law of Conservation of Mass States that Mass cannot be created nor destroyed, it can only change form.
In a chemical reaction, the sum of the masses of the reactants and products remains unchanged.
So, whenever there is a change in the mass of product it is the result of occurring in the open system and some of its paricle(mass) may escaped in the form of gas or during conversion of state.
Hence, the right answer is C, The chemical reaction is in an open system and a gas is beingreleased into the atmosphere.
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how many ingredients are acidic or basic in this image of (MISWAK TOOTHPASTE -TUBE)
The ingredients are classified below as acidic or basic as follows:
Acidic: Sodium Lauryl Sulfate, Carrageenan, Glycerin, Methylparaben, Propylparaben, Eugenol, Sorbitol,
Basic: Calcium carbonate, Aqua, Silica, Aroma (Flavour), Salvadora persica (Miswak/Al-Arak) extract, Cellulose gum (Sodium Carboxy Methylcellulose), Sodium Silicate, Sodium Benzoate, Sodium saccharin,
What are acids and bases?Acids are substances that produce hydrogen ions as the only positive ion when dissolved in water.
Acids can also be defined as substances that donate a proton.
Substances that are acidic have a pH of less than 7.
Bases are substances that react with acids to produce salt ad water only.
Bases can also be defined as substances that accept a proton.
Substances that are basic have a pH of less than 7.
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What is the bonding order of Li2?
Answer:bond order of one
Explanation:
The dilithium molecule is shown in the final diagram (Li2). The bonding orbital is filled by the 2s electrons rather than the 1s electrons, who are not involved in the bonding. Li2 has a bond order of 1 and is a molecule that is stable in the gas phase.
The number of chemical bonds that exist between two atoms is known as bond order.
Dilithium (Li2)
Bond Number = 2
Bonding electrons = 0 and anti-bonding electrons = 1
The p electrons entirely occupy the bonding orbital without the 1s electrons participating in bonding, leaving the antibonding orbital empty and resulting in a bond order of 1, suggesting a stable molecule (in this case, in the gas phase).
Lithium possesses 3 electrons in its neutral state because of its atomic number. Li2 will also have six electrons. However, the chemical formula we are given (Li2) has a negative charge, hence this compound also contains an additional electron (RED). Consequently, there are 7 electrons in all. The following diagram represents the MOT for this chemical. As seen in the diagram, we have four electrons in bonding molecular orbitals (BMO) and three in anti-bonding molecular orbitals (ABMO)
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how many single covalent bonds must a chlorine atom form to have a complete octet in its valence shell?
Answer:
Chlorine only needs to make one covalent bond. It has seven e- so it needs one more to make a full octet.
Explanation:
suppose you need to prepare 120.4 ml of a 0.183 m aqueous solution of nacl. what mass, in grams, of nacl do you need to use to make the solution?
The mass of NaCl required ( in grams) to make the aqueous solution is 1.287 g.
What is molecular mass? How do you calculate molecular mass?
A molecule's mass is the sum of the masses of all the atoms it contains. As it is the total mass of all the atoms in a molecule, it is calculated below
The molecular mass of NaCl = Atomic mass of Na + Atomic mass of Cl
= 23 + 35.5
= 58.5g/mol
Given the volume of aqueous solution = 120.4 ml or 0.1204 L
Molarity of solution = 0.183M
We know that,
Molarity = No. of moles/Volume
No. of moles = 0.183 × 0.1204
= 0.022 moThe molar.
Molar mass of NaCl = Mass of Na + Mass of Cl
= 23 + 35.5
= 58.5g/mol
Mass of NaCl = 0.022 × 58.5
= 1.287 g
So, the mass of NaCl required ( in grams) to make the aqueous solution is 1.287 g.
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