In an experiment, magnesium and hydrochloric acid react to produce dihydrogen and magnesium dichloride: Mg +2 HCl(aq) MgCl2(aq) + H2(g)

Assuming that the concentration of hydrochloric acid is sufficient for the magnesium to react completely, what is then the volume of gas collected if the experiment is carried out under the same conditions of temperature and pressure?

The gas produced by this reaction is collected in a bottle and its volume is measured by displacement of water. During the first test, the reaction of 0.050 g of magnesium makes it possible to collect 50.0 mL of gas. In the second test, 0.075 g of magnesium is used