The mole

A student reacts excess magnesium with 25.0 cm³ of 0.200 mol/dm³ hydrochloric acid.

The equation is:

$\, Mg + 2HCl \rightarrow MgCl_2 + H_2 \,$

What is the maximum volume of hydrogen gas produced at room temperature and pressure (RTP), where 1 mol of gas occupies 24.0 dm³?