Chapter 8.1, Problem 4PP

Determine whether each of the following equations is balanced or not balanced:

$\begin{array}{l}\begin{array}{l}\begin{array}{l}a.PC{I}_3\left(s\right)+C{1}_2\left(g\right)\to PC{l}_5\left(s\right)\\ b.CO\left(g\right)+2H_2\left(g\right)\to C{H}_{4}O\left(g\right)\end{array}\hfill \\ \begin{array}{l}c.2KC1O_3\left(s\right)\to 2KCI\left(s\right)+{\text{ O}}_{\text{2}}\left(g\right)\hfill \\ d.Mg\left(s\right)+N_2\left(g\right)\to M{g}_3{N}_2\left(s\right)\hfill \end{array}\hfill \end{array}\\ \end{array}$