Water vapor (H2O) reacting with hot iron (Fe) produces Fe3O4 and H2 gas: 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) A mixture of 500.0 g iron and 150.0 g water vapor was allowed to react inside a sealed reaction chamber. (a) Which is the limiting reactant in this scenario? (b) What is the theoretical yield of Fe3O4(s) in grams?