Question

PLEASE AND THANK YOU

If a sample of He effuses at a rate of 30 mol per hour at 45 degrees C, which of the gases below wil effuse at approx. one-half the rate under the same conditions?
A. CH4
B. O3
C. N2
D. H2

Answer 1

`CH_(4)`

Step-by-step explanation:

We know from laws of diffusion that
`rate\alpha\sqrt{(T)/(m) }`.

In the given question , it is said that temperature is same in both the cases .

So for rate to become half , molecular mass must be 4 times,ie,

Mass of required gas = 4×mass of He=4×4=16.

Therefore the gas is
`CH_(4)`