2Pb + O2 - 2PbO
4Na + O2 - 2Na2O
4Al + 3O2 - 2Al2O3
2Сa + O2 - 2CaO
2Cu + O2 - 2CuO
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2Pb + O2 - 2PbO
4Na + O2 - 2Na2O
4Al + 3O2 - 2Al2O3
2Сa + O2 - 2CaO
2Cu + O2 - 2CuO