What is (are) the unit(s) for the diffusion constant?

Question

Quizplus · Accepted Answer

The diffusion constant has units of m²/s because it is a measure of the rate at which a substance diffuses through a medium. The rate of diffusion is proportional to the concentration gradient of the substance, and the diffusion constant is a measure of the proportionality constant. The units of the diffusion constant are therefore m²/s, which is the product of the units of concentration (mol/m³) and the units of time (s).

What Is (Are) the Unit(s) for the Diffusion Constant