Преобразовать цепочки:
1. Na2O-->NaCl-->NaOH-->Na
2.Na2O-->NaOH-->Na2SO4-->NaNO3
1. Na2O-->NaCl-->NaOH-->Na
2.Na2O-->NaOH-->Na2SO4-->NaNO3
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Ответ:
1)
Na2O+2HCl-->2NaCl+H2O
2NaCl+2H2O-->2NaOH+Cl2↑+H2↑ (электролиз водного раствора)
4NaOH-->4Na+2H2O+O2↑ (электролиз расплава)