Answer:
Option A
Explanation:
For ideal gas, pV=nRT
pV= $\frac{m'}{M} RT$ (where, m' is the mass of the gas and M molecular weight)
$p=\frac{m'T}{V}\frac{RT}{M}$
$\therefore$ $p=\frac{\rho RT}{M}$
where, $\rho$ =$\frac{m'}{V}$ = density of the gas
$\Rightarrow$ $ \rho=\frac{ pM}{RT}=\frac{pM}{NkT}$, where N is Avogadro number
$\Rightarrow$ $ \rho=\frac{ pm}{KT}, $ where $ m=\frac{M}{N}$= mass of each molecule.
