A gasesous mixture of helium and oxygen is found to have a density of `0.518 g dm^(-3)` at `25 ^(@)C` and `720` torr. What is the precent by mass of helium in this mixture?

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 ?

A mixture of CO and CO_(2) is found to have a density of 1.5 g/L at 30^(@)C and 740 torr. What is the composition of the mixture.

A gaseous mixture of oxygen and helium is found to have a density of 0.518 gL^(-1) at 720 mm Hg and room temperature. Calculate the weight percentage of oxygen in the mixture.

A mixture of CO and CO_(2) is found to have a density of 1.50" g "L^(-1) at 20^(@)C and 740 mm pressure. Calculate the composition of the mixture.

A mixture of CO and CO_(2) is found to have density of 1.50 g /litre at 30^(@)C and 730 mm. Composition of mixture is