Complete and balance the following chemical equations :
(a) Zn(s)+HCl(aq)→
(b) Na2CO3(s)+HCl(aq)→
(c) NaHCO3(s)+HCl(aq)→
(d) NaOH(aq)+HCl(aq)→
(e) CuO(s)+HCl(aq)→
(a) ZnS(s)+2HCl(aq)⟶ZnCl2(aq)+H2S(g)
(b) Na2CO3(s)+2HCl(aq)⟶2NaCl(aq)+H2O(l)+CO2(g)
(c) HCl(aq)+NaHCO3(s)⟶NaCl(aq)+H2O(l)+CO2(g)
(d) HCl+NaOH⟶H2O+NaCl
(e) CuO(s)+2HCl(aq)⟶CuCl2(aq)+H2O(l)