Question

Na->Na2O2->Na2O->NaOH->Na3PO4->NaNO3

Answer 1

1) 2Na + O₂ --> Na₂O₂
2) Na₂O₂+2Na--->2Na₂O
3) Na₂O+H₂O---> 2NaOH
4) NaOH+H₃PO₄--->Na₃PO₄+2H₂O
5) Na₃PO₄+3HNO₃-->3NaNO₃+H₃PO₄