2 Fe₂S₃^-II + 9 O₂⁰ → 2 Fe₂O₃^-II + 6 S^IVO₂^-II

This is an oxidation-reduction (redox) reaction:

6 S^-II - 36 e^- → 6 S^IV (oxidation)

18 O⁰ + 36 e^- → 18 O^-II (reduction)

Change the oxidation states

Search by reactants (Fe₂S₃, O₂)

1.	Fe2S3 + O2 → Fe2O3 + SO2
2.	Fe2S3 + O2 + H2O → Fe(OH)3 + S
3.	Fe2S3 + O2 → FeO + SO2
4.	Fe2S3 + O2 → Fe + SO2

Search by products (Fe₂O₃, SO₂)

1 2 3
1.	FeS2 + O2 → Fe2O3 + SO2
2.	FeS + O2 → Fe2O3 + SO2
3.	FeAsS + O2 → As4O6 + Fe2O3 + SO2
4.	Fe2S3 + O2 → Fe2O3 + SO2
5.	FeSO4 → Fe2O3 + SO2 + O2
6.	Fe2(SO4)3 → Fe2O3 + SO2 + O2
7.	CuFeS2 + O2 → Fe2O3 + CuO + SO2
8.	FeSO4 → Fe2O3 + SO3 + SO2
9.	Fe + H2SO4 → Fe2O3 + SO2 + H2O
10.	CuFeS2 + O2 → Cu2S + Fe2O3 + SO2
1 2 3

Search by reactants (Fe₂S₃, O₂) and by products (Fe₂O₃, SO₂)

1.	Fe2S3 + O2 → Fe2O3 + SO2