AnswersFL-2003350-Chemistry 1 HonorsLimiting Reactant and Percent Yield

Limiting Reactant and Percent Yield Answers

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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%
2
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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

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

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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.
4

The formula is used to calculate the

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A
real
B
percent
C
molar
D
empirical
5

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
6

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
7

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.
8

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%
9

Consider the combustion reaction for acetylene. 2C2H2(l) + 5O2(g) 4CO2(g) + 2H2O(g)If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for this reaction?

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A
C2H2
B
O2
C
CO2
D
H2O
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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