Magnesium metal reacts with hydrochloric acid.....?

Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 14.5 mL of a 3 M solution of hydrochloric acid and collect all of the hydrogen in a balloon at 25 deg C and 1 atm. Whats the expected volume of the ballon?