Molecules undergo this process by Brownian motion.
This process's namesake coefficient is calculated using Fick's Second Law. Molecules undergo this process by Brownian motion. Like a related process, the rate of this process is proportional to one over the square root of molar mass by Graham's Law. A "facilitated" form of this process occurs across a cell membrane, and when water undergoes this process it is known as osmosis. For 10 points, name this movement of a substance down its concentration gradient.
This process's namesake coefficient is calculated using Fick's Second Law.
diffusion