Ответ:
1) 4Na+O2=2Na2O
2)Na2O+H2O=2NaOH
3) 3NaOH+H3PO4=Na3PO4+3H2O
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Ответ:
1) 4Na+O2=2Na2O
2)Na2O+H2O=2NaOH
3) 3NaOH+H3PO4=Na3PO4+3H2O