Ответ:
1) O2 + 2Mg = 2MgO
2) O2 + 2H2 = 2H2O
3) O2 + S = SO2
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Ответ:
1) O2 + 2Mg = 2MgO
2) O2 + 2H2 = 2H2O
3) O2 + S = SO2