Stoichiometry and Limiting Reagents Quiz

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What is the limiting reagent in the reaction Zn + 2 HCl $\rightarrow$ ZnCl2 + H2?

H2

ZnCl2

Zn (correct)

HCl

What is the theoretical yield of ZnCl2 when 0.100 mol of Zn reacts with excess HCl?

0.050 mol (correct)

0.200 mol

0.100 mol

0.025 mol

What is the percent yield if the actual yield of ZnCl2 is 0.045 mol?

90% (correct)

75%

80%

95%

If 0.100 mol of ZnCl2 is produced, how many moles of H2 are formed?

0.050 mol Signup and view all the answers

What is the definition of theoretical yield?

The amount of product expected based on the balanced equation Signup and view all the answers

What is the definition of actual yield?

The amount of product actually obtained in the lab Signup and view all the answers

What does percent yield indicate about a reaction?

The efficiency of the reaction Signup and view all the answers

In the equation $2Al + 3 CuSO4 ightarrow Al2(SO4)3 + 3 Cu$, what is the theoretical yield if 3.92 g of Al is reacted?

13.8 g Cu Signup and view all the answers

What is the actual yield in the given reaction if 6.78 g of copper is produced?

6.78 g Cu Signup and view all the answers

What is the percent yield in the given reaction if the theoretical yield is 13.8 g and the actual yield is 6.78 g?

49.1 % Signup and view all the answers

What is the general plan for stoichiometry calculations?

Mass reactant $ ightarrow$ Moles reactant $ ightarrow$ Moles product $ ightarrow$ Mass product Signup and view all the answers

In the decomposition reaction $NH4NO3 ightarrow N2O + 2 H2O$, if 454 g of NH4NO3 decomposes, how much N2O is formed?

5.68 mol N2O Signup and view all the answers

In the decomposition reaction $NH4NO3 ightarrow N2O + 2 H2O$, what is the theoretical yield of H2O if 454 g of NH4NO3 decomposes?

204 g H2O Signup and view all the answers

What does the subscript in a chemical equation represent?

A constant number that cannot be changed Signup and view all the answers

What can cause the actual yield to be less than the theoretical yield?

Impure reactants, competing side reactions Signup and view all the answers

Stoichiometry and Limiting Reagents Quiz

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