mixture of gases

Question

A mixture of He, Ar, and Xe has total pressure of 2.50atm. Partial pressure of He is 0.350atm, and partial pressure of Ar is 0.200arm What is partial pressure of Xe?

Answer 1

Assuming these gases make up equal percentages of the mixture, you can actually just add the partial pressures together to get the total pressure. So:

 

P = P_He + P_Ar + P_Xe

2.5 = 0.35 + 0.2 + P_Xe

 

Solve the equation for the partial pressure of Xenon, P_Xe.