Multiple Choice
Which statement correctly describes the relationship between the amount of reactant used and the percent yield in a chemical reaction?
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3. Chemical Reactions
Percent Yield
Multiple Choice
A reaction uses 32.5 g of Zn and produces 28.0 g of ZnCl_2. If the theoretical yield of ZnCl_2 is 40.5 g, what is the percent yield for the reaction?
A
127.5%
B
87.5%
C
69.1%
D
44.2%
Verified step by step guidance1
Identify the given quantities: the actual yield of ZnCl_2 is 28.0 g, and the theoretical yield of ZnCl_2 is 40.5 g.
Recall the formula for percent yield: \(\text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100\%\).
Substitute the given values into the formula: \(\text{Percent Yield} = \left( \frac{28.0\ \text{g}}{40.5\ \text{g}} \right) \times 100\%\).
Perform the division inside the parentheses to find the decimal yield (do not calculate the final number here).
Multiply the decimal yield by 100 to convert it to a percentage, which gives the percent yield of the reaction.
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