AnswersFL-2003350-Chemistry 1 HonorsPercent Composition and Molecular Formula

Limiting Reactant and Percent Yield Answers

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What is used up in and stops a chemical reaction?

A
percent yield
B
limiting reactant
C
theoretical yield
D
excess reactant
3

Which statement correctly describes the relationship between reactant and yield?

A
The actual yield is calculated from the amount of the excess reactant present.
B
The actual yield is calculated from the amount of the limiting reactant present.
C
The theoretical yield is calculated from the amount of the excess reactant present.
D
The theoretical yield is calculated from the amount of the limiting reactant present.
9

What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g?Use .

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A
12.52%
B
55.60%
C
79.83%
D
87.91%
10

The chemical equation shows how ammonia reacts with sulfuric acid to produce ammonium sulfate.2NH3(aq) + H2SO4(aq) (NH4)2SO4(aq)How many grams of ammonium sulfate can be produced if 60.0 mol of sulfuric acid react with an excess of ammonia?

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A
1,020 g
B
3,970 g
C
5,890 g
D
7,930 g
12

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
13

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%
15

A 13.00 g sample of citric acid (H3C6H5O7) reacts with an excess of baking soda as shown in the equation.What is the theoretical yield of carbon dioxide?

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A
0.993 g
B
2.98 g
C
3.65 g
D
8.93 g
16

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 .

Question illustration
A
17.8%
B
33.3%
C
35.7%
D
53.4%
17

Ammonia is produced by the following reaction.3H2(g) + N2(g) 2NH3(g)When 7.00 g of hydrogen react with 70.0 g of nitrogen, hydrogen is considered the limiting reactant because

Question illustration
A
7.5 mol of hydrogen would be needed to consume the available nitrogen.
B
7.5 mol of nitrogen would be needed to consume the available hydrogen.
C
hydrogen would produce 7.5 mol more ammonia than nitrogen.
D
nitrogen would produce 7.5 mol more ammonia than hydrogen.
18

What is used up in and stops a chemical reaction?

A
percent yield
B
limiting reactant
C
theoretical yield
D
excess reactant
19

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?

Question illustration
A
1.253 g
B
50.72 g
C
79.63 g
D
194.3 g
20

The formula is used to calculate the

Question illustration
A
real
B
percent
C
molar
D
empirical

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