2Na + O2 -> Na2O2
2Fe + O2 -> 2FeO
2S + 3O2 -> 2SO3
2Ca + O2 -> 2CaO
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2Na + O2 -> Na2O2
2Fe + O2 -> 2FeO
2S + 3O2 -> 2SO3
2Ca + O2 -> 2CaO
Железо(II) : FeO
Сера(VI) : SO3
Кальций : CaO