Question

please help me dont just comment for points please i actually need help

Order the relative rate of diffusion of the following gases from slowest to fastest.
1. 1                                   Ar
2. 2                                   Ne
3. 3                                   N
4. 4                                   Kr

Answer 1

Answer:

Kr < Ar < Ne < N (N is fastest and Kr is slowest)

Explanation:

According to graham law of diffusion, rate of diffusion of a gas is inversely proportional to the square root of molar mass of the gas.

                                        $R\propto \frac{1}{\sqrt{M}}$

Where R is rate of diffusion and M is molar mass

Molar masses of given gases are - Ar(40 g/mol), Ne(20 g/mol), N(14 g/mol) and Kr(84 g/mol)

So molar mass order : Kr > Ar > Ne > N

Hence rate of diffusion order: Kr < Ar < Ne < N (N is fastest and Kr is slowest)