Question

diffusion occurs due to​

Answer 1

Diffusion is random movement of molecules but has a net direction toward regions of lower concentration in order to reach an equillibrium. Simple passive diffusion occurswhen small molecules pass through the lipid bilayer of a cell membrane.

Answer 2

Diffusion is the mixing of particles of substance on their own.

Factors:

Density: higher the density, slower the rate of diffusion.

Temperature: higher the temperature, faster the rate of diffusion.

Physical State: Solid: Slow

                          Liquid: Faster

                          Gas: Fastest

Thanks!