Select the chemical equation that is balanced.
N2O3 + H2O → HNO2
N2O3 + H2O → 2 HNO2
2 N2O3 + 2 H2O → 3 HNO2
Fe2O3 + 3 H2 → 2 Fe + 3 H2O
Fe2O3 + H2 → Fe + H2O
Fe2O3 + H2 → 2 Fe + H2O