Magnesium can be used as a ‘’getter’’ in evacuated closures, to react with the last traces of oxygen. (The magnesium is usually heated by passing an electric current through a wire of ribbon or ribbon of the metal.) If an enclosure of 0.382 L has a partial pressure of O2 of 3.5x10-6 torr at 27◦C, what mass of magnesium will react according to the following equation?

2Mg (s) + O2 (g) ---> 2MgO(s)