A gas mixture contains each gas at the indicated partial pressure.
$$
\mathrm{CO}_{2} \quad 422 \mathrm{~mm} \mathrm{Hg}
$$
Ar
$$
102 \mathrm{~mm} \mathrm{H}_{8}
$$
$$
\begin{array}{lc}
\mathrm{O}_{2} & 165 \mathrm{~mm} \mathrm{Hg} \\
\mathrm{H}_{2} & 52 \mathrm{~mm} \mathrm{Hg}
\end{array}
$$
What is the total pressure of the mixture?