StoichiometryMass–Mole Stoichiometry1Choose the best answer12 g Mg reacts completely with excess acid: Mg + 2H⁺ → Mg²⁺ + H₂ Approximately how many moles of H₂ are produced?A1 molB0.5 molC2/3 molDNone of these Like 0 Discuss 0Share