Question

What is the volume occupied by 30 $g$ of neon gas at 67${}^{o}C$ and 750 $mm$ of $Hg$?

• A. 16.72 $L$
• B. 42.43 $L$
• C. 8.36 $L$
• D. 21.21 $L$

Answer 1

The correct option is B 42.43 $L$

According to the ideal gas law; $PV=nRT$
$P$ = pressure; $V$ = volume; $n$ = no. of moles = $\frac{20}{30}$ = 1.5 ; $T$ = temperature and $R$ = gas constant = 0.0821 $Latmmo{l}^{-1}{K}^{-1}$
Therefore $V$ = $\frac{nRT}{P}$
$V$ = $\frac{1.5\times 0.0821\times 340}{\left(\frac{750}{760}\right)}$
$V$ = 42.43 $L$