A cylinder contains 1 L of air at 10 atm and 298 K.
Knowing that air is composed of 79% N2 and 21% O2 by VOLUME, calculate the initial partial pressure for both.
Ideal Gas Law: PV = nRT
Mole Fraction: yi = moles of i / total moles
Partial Pressure: Pi = yi P
The Attempt at a Solution
The main thing throwing me off is that the composition is by Volume, not mass or moles.
I'm completely stumped on how to find the mole fractions.