Chapter 10, Problem 79RQ

Propylene, ${\text{C}}_{\text{3}}{\text{H}}_{\text{6}}$, reacts with hydrogen under pressure to give propane, ${\text{ C}}_{\text{3}}{\text{H}}_8$:

${\text{C}}_{\text{3}}{\text{H}}_{\text{6}}\left(g\right){\text{ + H}}_{\text{2}}\left(g\right)\stackrel{}{\to }{\text{ C}}_{\text{3}}{\text{H}}_{\text{8}}\left(g\right)$

How many liters of hydrogen (at 740 torr and $\text{24 °C}$) react with 18.0 g of propylene?