Limiting Reactant and Percent Yield Answers

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The electrolysis of water forms H2 and O2. 2H2O 2H2 + O2 What is the percent yield of O2 if 10.2 g of O2 is produced from the decomposition of 17.0 g of H2O?Use .

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A
15.1%
B
33.8%
C
60.1%
D
67.6%
2
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The chemical equation shows iron(III) phosphate reacting with sodium sulfate. 2FePO4 + 3Na2SO4 Fe2(SO4)3 + 2Na3PO4 What is the theoretical yield of Fe2(SO4)3 if 20.00 g of FePO4 reacts with an excess of Na2SO4?

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A
26.52 g
B
53.04 g
C
150.8 g
D
399.9 g
3

Consider the balanced equation. N2 + 3H2 2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3?Use .

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A
17.8%
B
33.3%
C
35.7%
D
53.4%
4

A 115.0-g sample of oxygen was produced by heating 400.0 g of potassium chlorate.2KClO3 2KCI + 3O2 What is the percent yield of oxygen in this chemical reaction?Use .

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A
69.63%
B
73.40%
C
90.82%
D
136.2%
5

Consider the balanced equation.2HCl + Mg MgCl2 + H2If 40.0 g of HCl react with an excess of magnesium metal, what is the theoretical yield of hydrogen?

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A
1.11 g
B
2.22 g
C
52.2 g
D
104 g
6

Salicylic acid (C7H6O3) reacts with acetic anhydride (C4H6O3) to form acetylsalicylic acid (C9H8O4). 2C7H6O3(aq) + C4H6O3(aq) 2C9H8O4(aq) + H2O(l)What is the limiting reactant if 70.0 g of C7H6O3 and 80.0 g of C4H6O3 react?

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A
water
B
salicylic acid
C
acetic anhydride
D
acetylsalicylic acid
7

The formula is used to calculate the

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A
real
B
percent
C
molar
D
empirical
8

Consider the balanced equation.CuSO4 + Zn ZnSO4 + CuIf 200.0 g of copper(II) sulfate react with an excess of zinc metal, what is the theoretical yield of copper?

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A
1.253 g
B
50.72 g
C
79.63 g
D
194.3 g
9

Consider the chemical equation.CuCl2 + 2NaNO3 Cu(NO3)2 + 2NaClWhat is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?Use .

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A
49.7%
B
58.4%
C
63.6%
D
78.7%
10

The equation represents the combustion of sucrose (C12H22O11). C12H22O11 + 12O2 12CO2 + 11H2OIf there are 10.0 g of sucrose and 8.0 g of oxygen, how many moles of sucrose are available for this reaction?

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A
0.029 mol
B
0.250 mol
C
0.351 mol
D
3.00 mol

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