Chlorine gas can be made in the laboratory by the reaction of hydrochloric acid and manganese(IV) oxide:
4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(g) + Cl₂(g)
When 1.82 mol of HCl reacts with excess MnO₂, how many
(a) moles of Cl₂ and