molar mass$_{Al}$ = 26.98 g/mol
molar mass$_{HCl}$ = 36.45 g/mol
molar mass$_{AlCl3}$ = 133.33 g/mol
molar mass$_{H2}$ = 2.00 g/mol
If 19.5 grams of aluminum completely react to form hydrogen gas according to the equation given, how much hydrogen gas is produced?