A reaction should give 24 g of product in theory, but 18 g is obtained. What is the percentage yield?
Answer and explanation
Correct answer: C. 75%
- Step 1: Percentage yield = actual yield / theoretical yield x 100.
- Step 2: 18 / 24 x 100 = 75%.
Answer
75%.
Why not the others: '133.33%' inverts the ratio of theoretical and actual yield; '0.75%' forgets to multiply by 100; '25%' gives the percentage lost, not the yield.
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