# If you are given 2 moles of hydrochloric acid, HCl(aq), how many grams of H_2(g) will be produced?

$H C l$ is a gas that CAN be dissolved in aqueous solution to give hydrochloric acid. It can oxidize metals to give dihydrogen and a salt:
$M \left(s\right) + 2 H C l \left(a q\right) \rightarrow M C {l}_{2} \left(a q\right) + {H}_{2} \left(g\right) \uparrow$