Consider the reaction sequence from P to Q shown below. The overall yield of the major product Q from P is 75 %. What is the amount in grams of Q obtained from 9.3 mL of P ? (Use density of P=1.00 g /mL ; Molar mass of C=12.0,H=1.0, O=16.0 and N=14.0 g/mL)

molar mass of Q $\text{ M.M. }=248$

Moles of Paniline
$9.3 \mathrm{mL}$ of $\mathrm{P}=9.3 \mathrm{g}$ of P
Moles of $P=\frac{9.3}{93}=0.1$

Here when P that is aniline takes place carbyl amine reaction the Amount of P is taken is 9.3 g .the mole of P will be 0.1  .

Moles of Q obtained $=0.1\times 0.75=0.075$

Hence the amount of Q obtained is 

Mass of Q obtained $=248\times 0.1\times \frac{3}{4}=18.6 \mathrm{g}$

Hence correct option is 18.6g that is option b.