Chapter 19, Problem 58QP

One of the half-reactions for the electrolysis of water is:

$2{\text{H}}^{\text{+}}\left(aq\right)+2^{e-}\to {\text{H}}_{\text{2}}\left(g\right)$

If 0.845 L of ${\text{H}}_{\text{2}}$ is collected at $\text{25ºC}$ and 782 mmHg, how many faradays of electricity had to pass through the solution?