A mixture of the gases N₂,O₂,and He has a total pressure of 760 mm Hg.If the partial pressure of N₂ is 90 mm Hg and of O₂ is 270 mm Hg,what is the partial pressure of He?

Question

Quizplus · Accepted Answer

The partial pressures of all the gases in the mixture should add up to the total pressure of 760 mm Hg. So, Total pressure = Partial pressure of N₂ + Partial pressure of O₂ + Partial pressure of He 760 mm Hg = 90 mm Hg + 270 mm Hg + Partial pressure of He Partial pressure of He = 760 mm Hg - 90 mm Hg - 270 mm Hg = 400 mm Hg Therefore, the answer is choice C, 400 mm Hg.

A Mixture of the Gases N2,O2,and He Has a Total

A Mixture of the Gases N₂,O₂,and He Has a Total