Multiple Choice
Calculate the percent yield of CO2 when 28.16 g of CO2 are produced from the reaction of 4.000 moles of C8H18 with 4.000 moles of O2, given the reaction: 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O.
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3. Chemical Reactions
Percent Yield
Multiple Choice
If the theoretical yield of NH₃ in a reaction is 40.0 g and the actual yield is 32.4 g, what is the percent yield?
A
85.5%
B
81.0%
C
90.0%
D
75.0%
Verified step by step guidance1
Understand the concept of percent yield: Percent yield is a measure of the efficiency of a reaction, calculated by comparing the actual yield to the theoretical yield.
Identify the given values: The theoretical yield of NH₃ is 40.0 g, and the actual yield is 32.4 g.
Use 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: \( \text{Percent Yield} = \left( \frac{32.4 \text{ g}}{40.0 \text{ g}} \right) \times 100 \% \).
Perform the division and multiplication to find the percent yield, ensuring to keep track of significant figures based on the given data.
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