A .662 g sample of metal, M, reacts completely with sulfuric acid according to M(s) + H2SO4(aq) —> MSO4(aq) + H2(g)

A volume of 301 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 torr, and the temperature is 25°C. The vapor pressure of the water at 25°C is 23.8 torr. Calculate the molar mass of the metal.