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Complete and balance the following equations:(a) $Na + O_2 →$(b) $Na_2O + H_2O →$(c) $Fe(s) + H_2O(g) \xrightarrow{red hot}$(d) $Cu(NO_3)(aq) + Zn →$
The complete balanced equations are given below:
(a) $4Na + O_2 → 2Na_2O$
(b) $Na_2O + H_2O → 2NaOH$
(c) $Fe(s) + H_2O(g) \xrightarrow{red hot} Fe_3O_4(s) + 4H_2(g)$
(d) $Cu(NO_3)(aq) + Zn → Zn(NO_3)2 + 2Cu$
 
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