Trimix 10/50 is a gas mixture that contains 10% oxygen and 50% helium, ant the rest is nitrogen. If a tank of Trimix 10/50 has a total pressure of 2.07 x 10 4 kPa, then what is the partial pressure of helium?

Answer 1

I presume the % is by volume; therefore, mole fraction He is 0.5
pHe = XHe*Ptotal
SHe = 0.5
Ptotal is given.
Solve for for pHe.