Question

The weight of $350\, mL$ of a diatomic gas at $0^{\circ}C$ and $2\, atm$ pressure is $1\, g$. The weight in $g$ of one atom at $NTP$ is:

• A. $2.64 \times 10^{-23}\,g$
• B. $2.64 \times 10^{-22}\,g$
• C. $5.28 \times 10^{-23}\,g$
• D. $0.82 \times 10^{-22}\,g$

Answer 1

Answer: (A)

$PV \frac{w}{M_{w}} RT$
$M_{w}=\frac{wRT}{PV}$
$\Rightarrow \frac{1\times0.082\times273}{2\times0.350}$
$M_{w}=32$