Chapter 8.1, Problem 5PP

All of the following are balanced equations. State the number of atoms of each element in the reactants and in the products.

$\begin{array}{l}a.2Na\left(.s\right)+C{1}_2\left(g\right)\to 2NaCI\left(s\right)\hfill \\ b.PC{1}_3\left(l\right)+3H_2\left(g\right)\to P{H}_3\left(g\right)+3HC1\left(g\right)\hfill \\ c.P_4{O}_{10}\left(s\right)+6H_{2}O\left(l\right)\to 4H_{3}P{O}_4\left(aq\right)\hfill \end{array}$