P2O5 - Phosphorus has an oxidation state of +5 in P2O5.KNO3 - Potassium has an oxidation state of +1, Nitrogen has an oxidation state of +5, and Oxygen has an oxidation state of -2 in KNO3.NH4Cl - Nitrogen has an oxidation state of -3, Hydrogen has an oxidation state of +1, Chlorine has an oxidation state of -1 in NH4Cl.Al2S3 - Aluminum has an oxidation state of +3, and Sulfur has an oxidation state of -2 in Al2S3.Ca(NO3)2 - Calcium has an oxidation state of +2, Nitrogen has an oxidation state of +5, and Oxygen has an oxidation state of -2 in Ca(NO3)2.Mg3P2 - Magnesium has an oxidation state of +2, and Phosphorus has an oxidation state of -3 in Mg3P2.