Chemistry · May / June 2019 · Paper 11 · Question 12
5070The mole and the Avogadro constant
The reaction for the conversion of bromoethane to ethanol is shown. C2H5Br + NaOH → C2H5OH + NaBr In an experiment, 10.90 g of bromoethane is converted into 3.45 g of ethanol. What is the percentage yield of ethanol? [Mr: C2H5Br, 109; C2H5OH, 46]
- A32%
- B42%
- C75%
- D100%
As printed in the paper
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Correct answer: C. 75%
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