A 0.486 gram sample of a metal, M, reacts completely with sulfuric acid according to:
M(s) + H2SO4(aq) → MSO4(aq) + H2(g)
A volume of 221 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 water at various temperatures can be found in this table. Calculate the molar mass of the metal.