Question

A vessel of volume V = 20 l contains a mixture of hydrogen and helium at a temperature t = 20°C and pressure p = 2.0 atm. The mass of the mixture is equal to m = 5.0 g. Find the ratio of the mass of hydrogen to that of helium in the given mixture.

Answer 1

Let the mixture contain v1 ans v2 ***** of H2 and He respectively. If molecular weights of H2 and He are M1 and M2 , then respective masses in the mixture are equal to

one can also express the above result in time of the effective molecular weight M of the mixture, define as,