MnO2 (s) + 4 HCl (aq) → MnCl2 (aq) + 2 H2O (l) + Cl2 (g)
1.How many grams of HCl are required to produce 224. liters of Cl2 at STP?

2.How many liters of chlorine (Cl2) at STP will be produced from 1.00 x 103 g of manganese dioxide (MnO2)?