Binary compounds of alkali metals and hydrogen react with water
to liberate H2(g). The H2 from the reaction of a sample of NaH with
an excess of water fills a volume of 0.475 L above the water. The
temperature of the gas is 35 ∘C and the total pressure is 765 mmHg.
Part A- Find the mass of H2 liberated Part B- Find the mass of NaH
that reacted.