What gas effuses faster than CO?

alot more

because it has a lower molecular mass than the others (1.00794)

Hydrogen will effuse faster because it has lower molecular weight 1g/mol.

In liquid, there is less space to move so collisions are more frequent between the molecules causing a slower diffusion rate. The opposite happens in gases. There is more space in gases. As a result,...

In liquid, there is less space to move so collisions are more frequent between the molecules causing a slower diffusion rate. The opposite happens in gases. There is more space in gases. As a result,...