Sb plus O2 how is this balanced?

Answer 1

Sb (antimony) oxidation states +3, +5, to oxygen -2: (it behaves like phosphor)

4Sb + 3O2 --> 2Sb2O3

4Sb + 5O2 --> 2Sb2O5

Answer 2

To balance the equation Sb + O2 -> Sb2O3, you need to have 4 molecules of antimony (Sb) and 3 molecules of oxygen (O2) on each side of the equation. This gives you 2 antimony atoms combining with 3 oxygen molecules to form 2 molecules of antimony oxide.