Question

A mixture of `CO " and " CO_(2)` is found to have a density of `1.5 g L^(-1) " at " 30^(@)C` and 730 torr. What is the composition of the mixture ?

Answer 1

Let the average molecular mass be M.
`M = (dRT)/(P) = 1.5 xx 0.0821 xx 303 xx (760)/(730) = 38.85`
Let `x` mole of `CO " and " (1 - x)` mole of `CO_(2)` be present
`x xx 28 + (1 - x) xx 44 = 38.85`
`x = 0.3218`
Mole % of `CO = 32.18` and mole % of `CO_(2) = 67.82`