Ответ:
4Na+O2=2Na2O
Na2O+H2O=2NaOH
3NaOH+H3PO4=Na3PO4+3H2O
2Mg+O2=2MgO
MgO+H2O=Mg(OH)2
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Ответ:
4Na+O2=2Na2O
Na2O+H2O=2NaOH
3NaOH+H3PO4=Na3PO4+3H2O
2Mg+O2=2MgO
MgO+H2O=Mg(OH)2