AnswersFL-2003350-Chemistry 1 HonorsLimiting Reactant and Percent Yield

Limiting Reactant and Percent Yield Answers

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1
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The formula is used to calculate the

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A
real
B
percent
C
molar
D
empirical
2
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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.
3

What is used up in and stops a chemical reaction?

A
percent yield
B
limiting reactant
C
theoretical yield
D
excess reactant
4

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%
5

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.
6

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

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