Chemistry · May / June 2020 · Paper 11 · Question 14
5070The mole and the Avogadro constant
Ethanol can be made by the reaction shown. C2H5Br + NaOH → C2H5OH + NaBr If 5.00 g of C2H5Br produces 1.59 g of ethanol, what is the molar percentage yield of ethanol? [Mr: C2H5Br, 109; C2H5OH, 46]
- A13%
- B32%
- C42%
- D75%
As printed in the paper
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Correct answer: D. 75%
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