Chemistry 60 help

Question

The reaction between hydrochloric acid and aluminum produces hydrogen gas and aluminum chloride. How many moles of  can be obtained when  mol  reacts with an excess 

Answer 1

6HCl + 2Al ==> 3H₂ + 2AlCl₃ ... balanced equation

Using the stoichiometry of the balanced equation and dimensional analysis, we have the following:

6.60 mol HCl x 3 mole H₂ / 6 mol HCl = 3.30 moles H₂