valkyriesan74 Hello, can you help me calculate the stoichiometric mass of each reaction? A)- C3H8 + 5 O2 → 3 CO2 + 4H2O B)- O2 + O → O3 C)- 2 H2O2 → 2 H2O + O2 D)- 4 Fe + O2 + 2 H2O → 2 Fe2O3H2O