Question

Which factor contributes the most to the rates of diffusion and effusion between two gases in a mixture?

a)The size of the particles.
b)The molar mass of the particles.
c)The interactions between the particles.
d)The relative volume of the particles to each other.

Answer 1

b)The molar mass of the particles.

Step-by-step explanation:

The rate of effusion of a gas is inversely proportional to the square root of its molar mass (Graham's law), a relationship that closely approximates the rate of diffusion. As a result, light gases tend to diffuse and effuse much more rapidly than heavier gases.