Krypton gas is four times denser than neon gas at the same temperature and pressure.

Question

Which gas is predicted to effuse faster?

Answer 1

Think of the effusion of gases this way. Suppose you have two dogs, a large and heavy one whose pal is a small and light one. Both want to go through a small hole in the fence. Which do you think can get through the small fence hole easier? The small light one of course. Same with atoms and molecules. The smaller lighter gases effuse faster.

Answer 2

thanks how do i know how much faster?