barerah barerah 26-04-2024 Chemistry Answered 40dm'3 HCl (g) at STP reacts with 50g Zn, which is placed in water to form ZnCl₂ and H2. Calculate the mass of H2 produced and unreacted reactant left. (Zn-65,Cl=35.5, H=1) Zn + 2HCI- →ZnCl2 + H2