In lab you are given a 0.226-gram sample of an unknown metal which you are told reacts completely with sulfuric acid according to the equation M(s) + H SO,(aq) MSO (aq) + H (9) You carry out the reaction and collect 235 milliliters of hydrogen gas over water, while keeping the water level in the collecting vessel the same as that surrounding the vessel. The atmospheric pressure is 760.0 Torr and the temperature is 25C. Calculate the atomic mass of the unknown metal. (The vapor pressure of water at 25C is 23.8 Torr.)