Question

A mixture of gas ''X'' (mol. wt. 16) and gas Y (mol. wt. 28) in the mole ratio a : b has a mean molecular weight 20. What would be mean molecular weight if the gases are mixed in the ratio b : a under identical conditions (gases are non reacting).









(1)

24

(2)

20

(3)

26

(4)

40

Answer 1

(1) 24
not sure but maybe

Answer 2

24 is answer of this question