A 0.662 gram sample of a metal, M, reacts completely with
sulfuric acid according to: M(s) + H2SO4(aq) ----> MSO4(aq)
+H2(g). A volume of 257 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
degrees C. Calculate the atomic mass of the metal.