[Bjc51192]

The rate of effusion of oxygen to an unknown gas is 0.935 what is the other gas?

So what I did was  32.00/(0.935)^2 which gave me 36.06

the choices were A) F2. B) Ar. C) N2 and D) Ne

I plugged in N2 28.02/(0.935)^2

and got roughly 32 which is the answer

What I dont understand is what is the point of the number 36.06

[opti384]

We know this "the rate of effusion of oxygen/the rate of effusion of the unknown gas = 0.935" right?

According to the Graham's law of diffusion, the rate of effusion(or diffusion) of gas A/the rate of effusion of gas B =

√((molar mass of gas B)/(molar mass of gas A))