Q4
A zinc metal sample containing zinc chloride as impurity was made to react with an excess of dilute hydrochloric acid at 27oC. Liberated hydrogen gas is collected at 760 mm Hg pressure that occupies 780.0cm3 volume. If the vapour pressure of water at 27oC is 14 mm Hg, what is the volume of H2 at STP? The Standard pressure is 760 mm Hg (molar volume of gas at standard temperature and pressure, STP=22.4dm3)