The mole

In an experiment, 1.00 g of magnesium reacts completely with excess dilute hydrochloric acid to produce hydrogen gas. The balanced equation is $\text{Mg} + 2\text{HCl} \rightarrow \text{MgCl}_2 + \text{H}_2$. What mass of hydrogen gas is formed? (Ar: H = 1.0, Mg = 24.0)