In an experiment in a general chemistry laboratory, a student collected a sample of a gas over water. The volume of the gas was $301$ mL at a pressure of $751$ torr and a temperature of $28\backslash$deg C$.$ The mass of the gas was $0\mathrm{.}333$ g$.$ The vapor pressure of water at that temperature is $28\mathrm{.}3$ torr.

What was the molar mass $($in g$/$mol$)$ of the gas?