# The volume occupied by

Question:

The volume occupied by $4.75 \mathrm{~g}$ of acetylene gas at $50^{\circ} \mathrm{C}$ and $740 \mathrm{mmHg}$ pressure is ____________L. (Rounded off to the nearest integer) (Given $\mathrm{R}=0.0826 \mathrm{~L} \operatorname{atm} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ )

Solution:

(5)

$T=50^{\circ} \mathrm{C}=323.15 \mathrm{~K}$

$\mathrm{P}=740 \mathrm{~mm}$ of $\mathrm{Hg}=\frac{740}{760} \mathrm{~atm}$

$\mathrm{V}=?$

moles $(\mathrm{n})=\frac{4.75}{26}$

$\mathrm{V}=\frac{4.75}{26} \times \frac{0.0821 \times 323.15}{740} \times 760$

$\mathrm{~V}=4.97 \simeq 5 \mathrm{Lit}$