Chapter 8.1, Problem 2PP

State the number of atoms of oxygen in the reactants and in the products for each of the following equations:

$\begin{array}{l}a.C{H}_4\left(g\right)+2O_2\left(g\right)\to C{O}_2\left(g\right)+2H_{2}O\left(g\right)\hfill \\ b.4P\left(s\right)+5O_2\left(g\right)\to P_{4}O10\left(s\right)\hfill \\ c.4N{H}_3\left(g\right)\text{ + }6NO\left(g\right)\to 5N_2\left(g\right)+6H_{2}O\left(g\right)\hfill \\ d.6C{O}_2\left(g\right)+6H_{2}O\left(l\right)\to C_6{H}_{12}{O}_6\left(aq\right)+6O_2\left(g\right)\hfill \end{array}$