Posted by **Chem123** on Friday, March 23, 2012 at 6:47am.

A fully sealed 50m^3 room at atmospheric pressure and temperature 20C contains two ballons, one containing helium and the other containing oxygen. The balloons each have a volume of 0.5m^3 and have gauge pressure 2m of water. The balloons are ruptured and helium and oxygen mix with the air in the room.

Determine mass and mol fractions of the gaseous species in the room, assuming that air contains 79% nitrogen and 21% oxygen by volume and atmospheric pressure is 100kPa.

Universal gas constant = 8.314

Atomic molar mass He = 4 g/mol"

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