Ответ:
1)4K+O2=2K20
2)4P+5O2=2P2O5
3)S+O2 =SO2
4)4Na+O2=2Na2O
5)2Mg+O2=2MgO
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Ответ:
1)4K+O2=2K20
2)4P+5O2=2P2O5
3)S+O2 =SO2
4)4Na+O2=2Na2O
5)2Mg+O2=2MgO