Chapter 5, Problem 5.6E

Determine the number of atoms of each element on each side of the following equations and decide which equations are balanced:

a. $\text{Ag}\left(\text{s}\right)+\text{Cu}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(\text{aq}\right)\to \text{Cu}\left(\text{s}\right)+{\text{AgNO}}_{\text{3}}\left(\text{aq}\right)$

b. ${\text{2N}}_{\text{2}}\text{O}\left(\text{g}\right)+{\text{3O}}_{\text{2}}\left(\text{g}\right)\to {\text{4NO}}_{\text{2}}\left(\text{g}\right)$

c. $\text{Mg}\left(\text{s}\right)+{\text{O}}_{\text{2}}\left(\text{g}\right)\to 2\text{MgO}\left(\text{s}\right)$

d. ${\text{H}}_{\text{2}}{\text{SO}}_4\left(\text{aq}\right)+\text{Ca}{\left(\text{OH}\right)}_{\text{2}}\left(\text{aq}\right)\to {\text{CaSO}}_4\left(\text{s}\right)+2{\text{H}}_{\text{2}}\text{O}\left(l\right)$