Consider the following reaction to generate hydrogen gas:
Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
The hydrogen gas is collected by displacement of water at 35.0 °C at a total pressure of 740 torr. The vapor pressure of water at 35.0 °C is 42 torr. Calculate the partial pressure of H2 (in atm) if 324.4 mL of gas is collected over water from this method.