Question

helium diffuses 4 times faster than an unknown gas under similar conditions. find vapour density of unknown gas​

Answer 1

Answer:

foll ow me plea se pleas e

Answer 2

Answer:

32

Explanation:

Vapour density of a gas =  Mass of n molecules of gas / Mass of n molecules of hydrogen

As given, we know that of mass of n molecules of hydrogen = 2

So we need to find the mass of n molecules of gas

Graham's law of Diffusion:  $\frac{r_{1}}{r_{2}}$ = $\sqrt{\frac{m\\_{2}}{m_{1} }}$

Therefore,  $\frac{4}{1}$ = $\sqrt{\frac{m_{2}}{4}}$ => $4^{2}$ x 4 = m2 => 64 = m2

So we got the mass of n molecules of gas, i.e., 64

Now the value of vapour density = 64/2 = 32