申論題

3. When the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of FeO and Fe₂C₃. In a certain experiment, 40.00 g iron metal was reacted with 22.40 g oxygen. After the experiment, the iron was totally consumed, and 6.48 g O₂ gas remained. Calculate the mounts of FeO and Fe₂O₃ formed in this experiment. (Fe = 55.85)