Question

The volume occupied by $4.75\text{g}$ of acetylene gas at ${50}^C$ and $750\text{mm Hg}$ pressure is \text{L}\).
(Round off to the nearest integer)
(Given, $R=0.0826{\text{L atm K}}^{-1}{\text{mol}}^{-1}$).

Answer 1

Given,
$T={50}^{o}C=323.15K$
$P=740\text{mm Hg}=\frac{740}{760}\text{atm}$
$V=?$
$\text{Moles(n)}=\frac{4.75}{26}\text{atm}$
$V=\frac{4.75}{26}\times 0.0821\times 323.15/740\times 760$
$V=4.975\text{L}$