Carboxylic acids and derivatives (A-level only)

Propanophenone can be prepared by the reaction between propanoyl chloride and benzene:

\text{CH}_3\text{CH}_2\text{COCl} + \text{C}_6\text{H}_6 \rightarrow \text{C}_6\text{H}_5\text{COCH}_2\text{CH}_3 + \text{HCl}

In a preparation, with an excess of benzene, the mass of propanoyl chloride ( $Mr=92.5M_{\text{r}} = 92.5$ ) used was 7.4 × 10^-2 kg.

The percentage yield of propanophenone was 70%.

What mass, in grams, of propanophenone was produced?

$g52\text{ g}$

$g75\text{ g}$

$g107\text{ g}$

$g134\text{ g}$