Question

Calculate the relative molecular mass [molecular weight] of 290 ml. of a gas ‘A’ at 17°C and 1520 mm pressure which weighs 2.73 g at s.t.p. [1 litre of hydrogen at s.t.p. weighs 0.09 g.]

Answer 1

To Convert the Vol.290 ml.of gas at s.t.p.

Molecular mass of gas = 2 x V.D.

= 2 x 55.55 = 111.10 g.