Why do molecules move from high concentration to low concentration??

Answer 1

Brownian motion.

The particles/molecules are moving around and they keep colliding with eachother. that makes them spread out/diffuse until the get to a point that they are the furthest away from each other.

http://www.scienceisart.com/A_Diffus/DiffusMain_1.html

Answer 2

Diffusion is the movement of particles of a substance from an area of high concentration to an area of low concentration, resulting in the uniform distribution of the substance. For example, diffusion of particles causes a net movement of particles from areas of higher concentration to areas of lower concentration until equilibrium is reached. This is simply the statistical outcome of random motion: diffusion is a spontaneous process (more familiarly known as a "passive" form of transport, rather than "active"). Diffusion can affect a variety of different quantities. Examples include diffusion of concentration, heat, or momentum. Diffusion increases entropy, decreasing Gibbs free energy, and therefore is thermodynamically favorable. Diffusion operates within the boundaries of the Second Law of Thermodynamics because it demonstrates nature's tendency to wind down, as evidenced by increasing entropy.[1]

Answer 3

due to osmosis and diffusion.....
in the case of carbon di oxide....diffusion
if the outer area of the cell is having higher concentration of molecules then the cell will take up some of it through the plasmalemma and cell wall...
and if it is having lesser amount then the cell will release some molecules to lower concentration area......

Answer 4

This process is called diffusion. This happens because molecules are in continuous random motion and they keep on moving until uniformity.

Answer 5

Primarily because of diffusion and the principle of equilibrium.

It's partially not osmosis because osmosis points directly to the movement of water molecules.

Hope it helps.

Answer 6

to achieve equilibrium
and ofcourse they are very much free to do so due to the principle of diffusion

Answer 7

Overcrowding?

Answer 8

osmosis.

every thing moves from high to low. air pressure, water, moutains, ice and tempertatures. Balance or as some people call it, Tai-Chi.

Answer 9

Because of diffusion.

Answer 10

to reach equilibrium,