What volume of hydrogen will be released during the reaction of 3 mol of zinc with sulfuric acid?

Reaction equation: Zn + H2SO4 = ZnSO4 + H2
Let’s find the amount of hydrogen substance: according to the reaction, 1 mol of hydrogen is formed from 1 mol of zinc, which means n (Zn) = n (H2) = 3 mol. Now let’s find its volume. V = n * Vm = 3 mol * 22.4 l / mol = 67.2 l. (Vm is molar volume, constant for all gases under normal conditions).
Answer: the volume of hydrogen is 67.2 liters.