Carboxylic acids and derivatives (A-level only)

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Question 20
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N-phenylethanamide can be prepared by the acylation of phenylamine using ethanoyl chloride:

CH3COCl+C6H5NH2→C6H5NHCOCH3+HCl \text{CH}_3\text{COCl} + \text{C}_6\text{H}_5\text{NH}_2 \rightarrow \text{C}_6\text{H}_5\text{NHCOCH}_3 + \text{HCl} CH3​COCl+C6​H5​NH2​→C6​H5​NHCOCH3​+HCl

In a preparation with an excess of phenylamine, the mass of ethanoyl chloride (Mr=78.5M_{\text{r}} = 78.5Mr​=78.5) used was 9.42 × 10-2 kg.

The percentage yield of N-phenylethanamide was 85%.

What mass, in grams, of N-phenylethanamide was produced?

47 g47\text{ g}47 g

138 g138\text{ g}138 g

162 g162\text{ g}162 g

191 g191\text{ g}191 g

Carboxylic acids and derivatives (A-level only) Questions

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