2C + O₂ → 2CO
4Fe + 3O₂ →2 Fe₂O₃
4Al + 3O₂ → 2Al2O3
2Ca + O₂ → 2CaO
4 Na + O₂ → 2 Na2O
2Cu + O2 → 2 CuO
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2C + O₂ → 2CO
4Fe + 3O₂ →2 Fe₂O₃
4Al + 3O₂ → 2Al2O3
2Ca + O₂ → 2CaO
4 Na + O₂ → 2 Na2O
2Cu + O2 → 2 CuO