Balance the following equations using the method outlined in Section 3.7:
(a) N2O5→ N2O4 + O2
(b) KNO3→ KNO2 + O2
(c) NH4NO3→ N2O + H2O
(d) NH4NO2→ N2 + H2O
(e) NaHCO3→ Na2CO3 + H2O + CO2
(f) P4O10 + H2O→ H3PO4
(g) HCl + CaCO3→ CaCl2 + H2O + CO2
(h) Al + H2SO4→ Al21SO423 + H2
(i) CO2 + KOH→ K2CO3 + H2O
(j) CH4 + O2→ CO2 + H2O
(k) Be2C + H2O→ Be1OH22 + CH4
(l) Cu + HNO3→ Cu1NO322 + NO + H2O
(m) S + HNO3→ H2SO4 + NO2 + H2O
(n) NH3 + CuO→ Cu + N2 + H2O