Ответ:2 Mg + O2 → 2 MgO
4 K + O2 → 2 K2O2 Na + Cl2 → 2 NaCl
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Ответ:
2 Mg + O2 → 2 MgO
4 K + O2 → 2 K2O
2 Na + Cl2 → 2 NaCl