As the molar mass of a substance increases, this term gets smaller, predicting a slower rate of diffusion. In liquids and solids, intermolecular forces have a greater effect, and you cannot accurately predict diffusivity solely on the basis of molar mass. read more
The rate of diffusion is inversely proportional to resistance, distance traveled down a concentration gradient and the weight of the molecule. The molecular weight of a substance is the total weight of all atoms present in the compound. read more
Diffusion is the movement of particles from where they are more concentrated to where they are less concentrated. The average kinetic energy of a particle (KE) gives us the temperature of a substance. read more