Question

Calculate the volume occupied by 5.0 $g$ of acetylene gas at ${50}^{\circ }C$ and 740 $mm$ pressure? (Report the answer as nearest integer)

Answer 1

$PV=nRT=\frac{w}{W}RT$
or $V=\frac{1}{P}\frac{w}{W}RT$
($M$ for $C_2{H}_2$ is 26)
$V=\frac{760}{740}\times \frac{5}{26}\times 0.0821\times 323=5.237L$
So, the integer value is 5.