And 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

Explanation:

We know from laws of diffusion that .

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

answer7,570,82356 cubic centimeters;