Which of the following is a balanced chemical equation?
2 Mg + HC1 → MgCl2 + H2
SO2 + O2 + 2 H2O → 4 H2SO4
2 Fe2O3 + 3 C → 4 Fe + 3 CO2
H2O2 → H2O + O2
2 Mg + HC1 → MgCl2 + H2
SO2 + O2 + 2 H2O → 4 H2SO4
2 Fe2O3 + 3 C → 4 Fe + 3 CO2
H2O2 → H2O + O2