Chapter 7.4, Problem 7.40PP

Balance each of the following chemical equations:

a. $\text{Zn}(s)+{\text{HNO}}_{\text{3}}(aq)\to {\text{H}}_{\text{2}}\left(g\right)+\text{Zn}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}(aq)$b. $\text{Al}(s)+{\text{ H}}_{\text{2}}{\text{SO}}_{\text{4}}(aq)\to {\text{H}}_{\text{2}}\left(g\right)+{\text{Al}}_{\text{2}}{\left({\text{SO}}_{\text{4}}\right)}_{\text{3}}(aq)$
c. ${\text{K}}_{\text{2}}{\text{SO}}_{\text{4}}\left(aq\right)+{\text{ BaCl}}_{\text{2}}\left(aq\right)\to {\text{BaSO}}_{\text{4}}\left(s\right)+\text{ KCl}\left(aq\right)$d. ${\text{CaCO}}_{\text{3}}\left(s\right)\to \text{CaO}\left(s\right)+{\text{CO}}_{\text{2}}\left(g\right)$