Question

The vapour density of a gas is 20.What is the volume occupied by 20g gas at ntp

Answer 1

Answer:1.24* 10^-2

Explanation:PV=nRT

Or, 10^5 pascal (V) =n 8.314 * 298

Here n = weight ÷ molecular weight

Now, as Molecular weight = vapour density *2

So here = 20 *2 =40

So, n = 20÷40=.5

So again, 10^5* V=0.5*8.314*298

$o V = 1.24*10^-2