Ответ:
2Mg+O2=2MgO
4Al+ 3O2=2Al2O3
4P+502=2P2O5
4K+O2=2K2O
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Ответ:
2Mg+O2=2MgO
4Al+ 3O2=2Al2O3
4P+502=2P2O5
4K+O2=2K2O