Consider the reaction between HCl and O2:
4HCl (g) + O2 (g) → 2H2O (l) + 2Cl2 (g)
When 63.1 g of HCl are allowed to react with 17.2 g of O2, 56.5 g of Cl2 are collected.
Determine the limiting reactant for the reaction.
Express your answer as a chemical formula.
Determine the theoretical yield of Cl2 for the reaction.