Complete and balance each of the following equations, some may have no reactions.

Question

NaNO3(aq)+KCl(aq)-->

NaCl(aq)+Hg2(C2H3O2)2(aq)-->
note that Hg(I)^+1 interacts with another Hg(I)^+1 ion to produce the cation Hg2^2+

(NH4)2SO4(aq)+CuCl2(aq)-->