A sample of unknown metal, X (s) which is having, formed 71.4 ml of hydrogen gas when they are reacted with the HCl according to the equation: X(s)+ 2 HCl(aq) --> XCl2(aq) + H2(g)
At 23 o C the gas was collected over the water and the levels of water inside or outside the gas collecting tube identical. The atmospheric pressure is 752 mm Hg and the vapor pressure of water at 23 o C is 21.1 mm Hg. Determine the molar mass of unknown metal, X. (Where R =0.0821 L atm/ mol K)