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Questions asked by users might not always be phrased in the clearest way.
Here are the balanced chemical equations:
(a) 2 N2O5 → 2 N2O4 + O2
(b) 2 KNO3 → 2 KNO2 + O2
(c) NH4NO3 → N2O + 2 H2O
(d) 2 NH4NO2 → N2 + 4 H2O
(e) Na2CO3 → Na2CO3 + H2O + CO2