Chapter 7.4, Problem 7.39PP

Balance each of the following chemical equations:

a. $\text{Mg}\left(s\right)+{\text{AgNO}}_{\text{3}}\left(aq\right)\to \text{Mg}{\left({\text{NO}}_3\right)}_{\text{2}}\left(aq\right)+\text{Ag }\left(a\right)$
b. $\text{Al}\left(s\right)+{\text{CuSO}}_{\text{4}}\left(aq\right)\to {\text{Al}}_{\text{2}}{\left({\text{SO}}_{\text{4}}\right)}_{\text{3}}\left(aq\right)+\text{Cu}\left(s\right)$
c. $\text{Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)+\text{NaCl}\left(aq\right)\to {\text{PbCl}}_{\text{2}}\left(a\right)+{\text{NaNO}}_{{}_{\text{3}}}\left(aq\right)$d. $\text{Al}\left(a\right)+\text{ HCl}\left(aq\right)\to {\text{H}}_{\text{2}}\left(g\right)+{\text{ AlCl}}_{\text{3}}\left(aq\right)$