Fe->FeO3->Fe(OH)3->Fe(SO4)3

Question

Fe->FeO3->Fe(OH)3->Fe(SO4)3

Answer 1

4Fe + 3O2 =2 Fe2O3

Fe2O3 +3H2O = 2Fe(OH)3

2Fe(OH)3 + 3H2SO4 = Fe2(SO4)3 + 6H2O