Question

$I$. The equation $MW=dRT/PV$ can be used to calculate the molecular weight of a gas.
$II$. The unit for density, the gas constant, temperature, pressure and volume are:
$d=g/mL$,
$R=L\times atm/(mol\times K)$,
$T=K$,
$P=atm$, and
$V=L$

• A. Statement $I$ is true, Statement $II$ is true
• B. Statement $I$ is true, Statement $II$ is false
• C. Statement $I$ is false, Statement $II$ is true
• D. Statement $I$ is false, Statement $II$ is false

Answer 1

The correct option is C Statement $I$ is false, Statement $II$ is true

From ideal gas equation,

$PV=nRT$

$P=\frac{m}{M\times V}\times R\times T$

$M=\frac{d\times R\times T}{P}$ $(d=density=\frac{m}{V})$

Where $d=g/ml$

$R=L$ atm ${mol}^{-1}{K}^{-1}$

$T$ is in kelvin

$P=$ atm

Hence, statement I is incorrect, II is correct.