posted by UTramos .
A mixture of Ar and N2 gases has a density of 1.361 g/L at STP. What is the mole fraction of each gas?
not sure on really where to start
Work this as the classic mixture:
the mass of 22.4 liters of the gas is 1.361*22.4 grams.
molmassargon*Far + molmassN2*Fn2=1.361*22.4
where Far + Fn2=1
You are solving for Far and Fn2.
What do u mean by Far and Fn2 where do i get those values?
That is the mole fractions: Far is the argon mole fraction, and fn2 is the nitrogen mole fraction. YOu get them by solving the two equations.