Answer:
The moles of PH₃ produced are 0.2742 and the total number of moles of gas present at the end of the reaction is 0.6809.
Explanation:
Phosphorus reacts with H₂ according to the balanced equation:
P₄ (s) + 6 H₂ (g) ⇒ 4 PH₃ (g)
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
P₄: 1 moleH₂: 6 molesPH₃:4 molesBeing the molar mass of the compounds:
P₄: 124 g/moleH₂: 2 g/molePH₃: 34 g/moleThe following mass amounts of each compound participate in the reaction:
P₄: 1 mole* 124 g/mole= 124 gH₂: 6 mole* 2 g/mole= 12 gPH₃: 4 moles* 34 g/mole= 136 gAn ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case you know:
P= 2 atmV= 10 Ln= ?R= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 298 KReplacing:
2 atm*10 L= n*0.082 [tex]\frac{atm*L}{mol*K}[/tex] *298 K
and solving you get:
[tex]n=\frac{2 atm*10 L}{0.082\frac{atm*L}{mol*K}*298 K }[/tex]
n=0.818 moles
The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, you can use a simple rule of three as follows: if 6 moles of H₂ react with 124 g of P₄, 0.818 moles of H₂ with how much mass of P₄ will it react?
[tex]mass of P_{4}=\frac{0.818 moles of H_{2}*124 grams of P_{4}}{6 moles of H_{2}}[/tex]
mass of P₄= 16.90 grams
But 16.90 grams of P₄ are not available, 8.50 grams are available. Since you have less mass than you need to react with 0.818 moles of H₂, phosphorus P₄ will be the limiting reagent.
Then you can apply the following rules of three:
If 124 grams of P₄ produce 4 moles of PH₃, 8.50 grams of P₄, how many moles do they produce?[tex]moles of PH_{3} =\frac{8.5 grams of P_{4}*4 moles of PH_{3} }{124grams of P_{4}}[/tex]
moles of PH₃=0.2742
If 124 grams of P₄ react with 6 moles of H₂, 8.50 grams of P₄ with how many moles of H₂ do they react?[tex]moles of H_{2} =\frac{8.5 grams of P_{4}*6 moles of H_{2} }{124grams of P_{4}}[/tex]
moles of H₂= 0.4113
If you have 0.818 moles of H₂, the number of moles of gas H₂ present at the end of the reaction is calculated as:
0.818 - 0.4113= 0.4067
Then the total number of moles of gas present at the end of the reaction will be the sum of the moles of PH₃ gas and H₂ gas that did not react:
0.2742 + 0.4067= 0.6809
Finally, the moles of PH₃ produced are 0.2742 and the total number of moles of gas present at the end of the reaction is 0.6809.
The ideal gas equation gives the approximate amount of PH₃ produced
and the gas at the conclusion as 0.28 and 0.69 moles respectively.
Response:
First part:
The PH₃ gas produced is approximately 0.28 molesSecond part:
The number of moles of gas present at the conclusion of the reaction is approximately 0.69 molesWhat is the ideal gas equation, and how does it give the number of moles of gas present?Given:
Mass of phosphorus = 8.50 g
Pressure of hydrogen gas, P = 2.00 atm
Volume of hydrogen gas, V = 10.0–L
Temperature of the gas, T = 298 K
First part:
From the ideal gas equation, P·V = n·R·T, we have;
[tex]Number \ of \ moles, \ n = \mathbf{\dfrac{P\cdot V}{R \cdot T}}[/tex]
Where for the hydrogen gas, H₂, we have;
P = 2.00 atm
V = 10.0 L
T = 298 K
The universal gas constant, R = 0.08205 L·atm·mol⁻¹·K⁻¹
Which gives;
[tex]n = \mathbf{ \dfrac{2.00 \times 10.0}{0.08205 \times 298}} \approx 0.82[/tex]
The number of moles of H₂ in the reaction, n ≈ 0.82 moles
The equation of the reaction is; P₄(s) + 6H₂(g) [tex]\longrightarrow[/tex] 4PH₃(g)Therefore;
1 mole of P₄(s) and 6 moles of H₂(g) produces 4 moles of PH₃(g)
Molar mass of P₄ ≈ 123.9 g
Which gives;
Number of moles in 8.50 g of phosphorus = [tex]\frac{8.5}{123.9}[/tex] ≈ 0.069
0.069 moles of P₄ will react with 0.069 × 6 moles ≈ 0.41 moles of H₂ to produce 0.069 × 4 moles ≈ 0.28 moles of PH₃
Number of moles of PH₃ gas produced is approximately 0.28 molesSecond part:
The total number of moles of gas present at the conclusion of the reaction is therefore;
∑Gas ≈ 0.28 moles + (0.82 - 0.41) moles ≈ 0.69 molesLearn more about the ideal gas equation here:
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What happens when an electric charge moves
Answer:
When an electric charge moves, heat is dissipated due to the drift velocity hence current is induced
How did Mendeleev arrange the known elements in his periodic table? O A. According to the number of protons O B. According to the number of electrons O C. According to atomic mass O D. According to atomic number
Mendeleev arranged the known elements in his periodic table according to atomic number (option D).
What is the periodic table?Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).
The chemical elements are organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson.
Dmitri Mendeleev is the Russian scientist that formulated the periodic table of chemical elements and arranged them in order of increasing atomic number.
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Answer: C.
Explanation:
according to atomic mass
A patient is prescribed 100mg/day of antibiotic for 2 weeks. The antibiotic is available in vials that contain 20mg/vial of the drug. How many vials are necessary for the entire treatment?
Consider this reaction: 2HgO→2Hg+O2 .
Which of the following is the best explanation for why this reaction is a decomposition reaction?
Question 5 options:
Because it is balanced
Because oxygen is one of the reactants
Because there are two products
Because there is only one reactant
Answer:
becous thear are two products
Explanation:
The statement is "Because there is only on reactant."
What is reactant?Reactant are raw materials that react with one another and form products.
What is decomposition reaction?
A decomposition reaction can be defined as a chemical reaction in which one reactant breaks into two or more product.
Hence the correct explanation about the reaction is "because there is only one reactant"
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What gases make up Jupiter? Name moons of Jupiter Can Jupiter sustain life How many rings does Jupiter have The weather on Jupiter
Answer: Jupiter is made up predominantly of hydrogen. Jupiter's Moon, Europa, might be able to support life. Jupiter has 3 skinny rings. Usually around -234 degrees Fahrenheit.
What would you use to determine whether an acid or alkali has been added to a solution?
A. Reactant
B. Indicator
C. Adjustor
D. Identifier
Answer:
B. Indicator
Explanation:
An indicator is used to determine whether an acid or alkali has been added to a solution.
An acid or alkali changes the hydrogen ion concentration in solution. This is indicated by the pH of the solution after which the acid or alkali has been added.
To see this change, indicators are used. An indicator employs color changes to show a change in chemical properties which pertains to the pH. There are several indicators used which are litmus paper, phenolphthalein, methyl orangeWhich one of these is NOT one of the characteristics of living things?
A.All living things reproduce.
B.All living things are composed of one or more cells.
C.All living things grow develop and have life spans.
D.All living things provides heat and light on Earth.
Answer:
D. All living things provides heat and light on Earth.
Explanation:
its the sun that does that
Answer:
option d.
Explanation:
all living things provides heat and light on Earth.
A family requires 20,000 KJ of fuel energy every day. If calorific vlaue
of the fuel used by them is 15,000 kJ/kg, how much of this fuel will be
required by this family to meet their energy needs for the month of April?
Answer:
40 kilograms of fuel are required to meet their energy needs for the month of April.
Explanation:
The month of April has 30 days and the full energy needed by the family is determine by the following combustion formula, derived from dimension analysis:
[tex]n\cdot Q = m\cdot L_{c}[/tex] (1)
Where:
[tex]m[/tex] - Mass of the fuel, measured in kilograms.
[tex]L_{c}[/tex] - Calorific value of the fuel, measured in kilojoules per kilogram.
[tex]Q[/tex] - Daily fuel energy, measured in kilojoules.
[tex]n[/tex] - Number of days of the month, dimensionless.
If we know that [tex]Q = 20000\,kJ[/tex], [tex]n = 30[/tex] and [tex]L_{c} = 15000\,\frac{kJ}{kg}[/tex], then the amount of fuel required to meet their energy needs for the month of April is:
[tex]m = \frac{n\cdot Q}{L_{c}}[/tex]
[tex]m = \frac{(30)\cdot (20000\,kJ)}{15000\,\frac{kJ}{kg} }[/tex]
[tex]m = 40\,kg[/tex]
40 kilograms of fuel are required to meet their energy needs for the month of April.
Which of the following is a radioactive element?Sodium, Fluorine,Oxygen
francium
Answer:
Fluorine
Explanation:
These particles stick in the atoms and make them radioactive.
2.92 x 10^-15/
(5.6 x 10^-3) (4.16 x 10^9)
Answer:
3645.46
Explanation:
calculated
PLS HELP ASAP THIS IS DUE TODAY
Answer: what grade are u in ill help
Explanation:
How much
much hydrogen gas evolved
when 1.5 current is passed through water for 1.5 hours?
0.042 moles of Hydrogen evolved
Further explanationGiven
I = 1.5 A
t = 1.5 hr = 5400 s
Required
Number of Hydrogen evolved
Solution
Electrolysis of water ⇒ decomposition reaction of water into Oxygen and Hydrogen gas.
Cathode(reduction-negative pole) : 2H₂O(l)+2e⁻ ⇒ H₂(g)+2OH⁻(aq)
Anode(oxidation-positive pole) : 2H₂O(l)⇒O₂(g)+4H⁻(aq)+4e⁻
Total reaction : 2H₂O(l)⇒2H₂(g)+O₂(g)
So at the cathode H₂ gas is produced
Faraday : 1 mole of electrons (e⁻) contains a charge of 96,500 C
[tex]\tt mol~e^-=\dfrac{Q}{96500}[/tex]
Q = i.t
Q = 1.5 x 5400
Q = 8100 C
mol e⁻ = 8100 : 96500 = 0.084
From equation at cathode , mol ratio e⁻ : H₂ = 2 : 1, so mol H₂ = 0.042
ways of preventing rusting
Answer:
Here is your answer......
A chemist measures the amount of bromine liquid produced during an experiment. She finds that 496g of bromine liquid is produced. Calculate the number of moles of bromine liquid produced.
Answer:
6.208 mol
Explanation:
Mass of Bromine Liquid = 496g
Number of moles = ?
Relationship between number of moles and mass is given as;
Number of moles = Mass / Molar mass
Molar mass of Bromine = 79.9g
Number of moles = 496 / 79.9 = 6.208 mol
How many electrons will an Oxygen (O) atom gain or lose in forming an ion?
Answer:
two electrons.... oxygen needs two electrons to attain stability
_____________________________________ are changes in an organism’s genetic material.
Answer:
The answer is Evolution.
Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.
11. Everybody loves Mr Brown
Answer:
NO I DON'T ✌✌✌✌✌✌✌✌✌
A 52 gram sample of an unknown metal requires 714 Joules of energy to heat it from
30.5◦C to 82◦C. What is the specific heat of
this metal?
Answer in units of J/g ·
◦ C.
Answer: Approximately [tex]0.267 \frac{\text{J}}{\text{g}^{\circ}\text{C}}[/tex]
===================================================
Work Shown:
We have the following variables
Q = 714 joules = heat requiredm = 52 grams = massc = specific heat = unknown[tex]\Delta t[/tex] = 82-30.5 = 51.5 = change in temperaturenote: the symbol [tex]\Delta[/tex] is the uppercase Greek letter delta. It represents the difference or change in a value.
Apply those values into the formula below. Solve for c.
[tex]Q = m*c*\Delta t\\\\714 = 52*c*51.5\\\\714 = 52*51.5*c\\\\714 = 2678*c\\\\2678*c = 714\\\\c = \frac{714}{2678}\\\\c \approx 0.26661687826737\\\\c \approx 0.267\\\\[/tex]
The specific heat of the unknown metal is roughly [tex]0.267 \frac{\text{J}}{\text{g}^{\circ}\text{C}}[/tex]
What makes this inauguration different from the past?
Answer:
there's just a lot of drama around grumpy trumpy's StOlEN eLecTiOn which are all just fake claims. all his hardcore followers are brainwashed into believing anything he says, so people (especially people who are inside the capitol) fear that trump's followers might incite violence AGAIN even after they broke into the Capitol on the 6th.
That's why they have the National Guard and thousands of people to keep the building secure during Biden's Inauguration.
hope this helps!
Which of the following describes hetereogeneous mixture... 1)A mixture that is easily separated, the components are different sixes and unevenly mixed. 2) A mixture that is very difficult to separate, the contents are evenly mixed and the mixture looks like a substance
Answer:
1)A mixture that is easily separated, the components are different sixes and unevenly mixed.
Explanation:
Mixtures are impure substances with usually indefinite composition. Their constituents often retains their identities. They can easily be separated into constituents by physical methods.
Homogenous mixtures have their constituents existing in only one phase.
Heterogeneous mixtures have their constituents existing in at least two different phases.
Heterogenous mixtures are easily separated due to the phase differences of its constituents. They are easily separated by physical processes compared to homogeneous mixtures.Balancing Equations 1. .
_NH4NO3 → _N20 + _H20
Answer:
_ NH4NO3 -> _ N2O + 2 H2O
Explanation:
By having 2 water molecules, we reach the 4 H atoms and 3 O atoms that are present on the left side. We don't add any other coefficients because we already have enough N atoms and we don't have to manipulate the left side at all.
Covalent bonding occurs between atoms when 1. The potential energy of the shared elec- trons is lower in the bond than it would be if the electrons were not shared between two nuclei 2. The potential energy of the shared elec- trons is independent of the covalent bond, but the potential energy of the newly formed molecule is greater than the individual atoms 3. Covalent bonding occurs when the octet rule is satisfied regardless of the potential en- ergy of the shared electrons 4. The potential energy of the shared elec- trons is higher in the bond than it would be if the electrons were not shared between two nuclei
Answer:The potential energy of the shared elec- trons is lower in the bond than it would be if the electrons were not shared between two nuclei
Explanation:
The entire essence of chemical combination is the attainment of a lower potential energy.
When two atoms are isolated at a large distance from each other, the potential energy is high.
However as the nuclei of the two atoms approach each other, the potential energy decreases until a minimum is attained. The distance between the nuclei at this point is the bond distance.
Hence, the potential energy of the shared electrons is lower in the bond than it would be if the electrons were not shared between two nuclei.
What mass of hydrogen is required to react with 24.7 g of nitrogen?
Answer:
10.80 g of H2
Explanation:
As per the equation, let us calculate the mole ratio. N2+3H2→2NH3. As per the equation one mole of nitrogen
which is a characteristics of all ions
Answer:
All ions must a overall charge
Explanation:
Answer:
i belive its B
Explanation:
please help and if u dont know that ok but pleas don't give me the wrong answer
Answer: The answer is 2 and 4
Answer: B
Explanation: Some types of waves are able to travel through space. Some can even travel through solids and liquids.
Which electron configuration is impossible?
a. ls22s22p2d2
b. 1s22s22p63s23p64s
c. 1s22s22p63s23p3
d. 1s22s22p63s2
e. 1s22s22p63s23s54s
1
Answer:
MP hippopotamus
Explanation: I'm in the fifth grade so yeah I really don't know this so I'm just going to say some random stuff and white cheddar mac and cheese warm TV perfect back MD 11443 to 2885 eleven 12:20 to 11 132 0.24 answer
9. Which atom is more likely to make a positive charge?
Oxygen or Hydrogen
What is the molecular formula for a compound with a molar mass of 42.08g/mol and an empirical formula of ch2
Answer:
[tex]C_3H_6[/tex]
Explanation:
Hello!
In this case, since the empirical formula is the smallest representation of the molecular formula, it is known that the times in which the empirical formula is into the molecular formula is a whole number and is computed by dividing the molar mass of the molecular formula by that of the empirical formula as shown below:
[tex]\frac{42.08g/mol}{12.01+1.01x2}= \frac{42.08g/mol}{14.03g/mol}=3[/tex]
Thus, the molecular formula times the empirical formula by 3 to obtain:
[tex]C_3H_6[/tex]
Regards!
A barium atom (Ba) would form its most stable ion by the 1. gain of one electron. 2. loss of one electron. 3. loss of 56 electrons. 4. gain of two electrons. 5. loss of two electrons.
By definition, the correct answer is option 5. A barium atom (Ba) would form its most stable ion by the loss of two electrons.
An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.
In other words, anions are negatively charged ions and are formed when metals gain electrons. Cations are positively charged ions and are formed when a metal loses electrons.
The electrostatic attraction between positives and negatives attracts the particles to each other and creates an ionic compound.
A barium (Ba) atom is a metal, so it loses 2 electrons to comply with the octet rule, which states that the atoms of the elements bond together in an attempt to complete their valence shell, leaving the atom stable with 8 electrons in its last shell and thus be stable.
Finally, the correct answer is option 5. A barium atom (Ba) would form its most stable ion by the loss of two electrons.
Learn more:
https://brainly.com/question/14368735?referrer=searchResultshttps://brainly.com/question/3360830?referrer=searchResultsA student is trying to determine the density of a piece of metal. She uses a balance and finds that the mass of the piece of metal is 15.36 g. To determine the volume of the metal she fills a graduated cylinder to 30.0 mL and then drops the piece of metal into the graduated cylinder. The final volume of the metal 34.1 mL. What is the density of the piece of metal
Answer:
3.746 g/mL
Explanation:
Mass of metal = 15.36 g
Initial Volume = 30.0 mL
Final Volume = 34.1 mL
Volume of metal = Final Volume - Initial Volume = 34.1 mL - 30.0 mL
Volume of metal = 4.1 mL
Density = ?
The relationship between the values is given as;
Density = Mass of metal / Volume of metal
Inserting the values;
Density = 15.36 / 4.1 = 3.746 g/mL
The density of the piece of metal is 3.746 g/ml.
How to find the density of any metal?Given the mass of metal is 15.36 g
The initial volume of a cylinder is 30.0 ml
The final volume after putting metal in it is 34.1ml
Step 1- To find the volume:
The volume of metal = Final Volume – Initial Volume 30.0 mL
Volume of metal = 34.1 – 30.0 = 4.1 ml
Volume of metal = 4.1 mL
Step 2- Find the Density:
Density = Mass of metal is divided by the Volume of metal
[tex]\bold{Density = \dfrac{15.36 }{4.1} =3.746 g/ml}[/tex]
Thus, the density is 3.746 g/ml.
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