Question

Diffusion occurs when molecules constantly move and collide with each other. Which of the following correctly describes the net movement of molecules in diffusion?

Answer 1

Diffusion is the movement of molecules from high to low concentration until the concentration is uniform. This occurs due to constant molecular motion and collisions. The net movement is from more tightly packed areas to less tightly packed areas.

Step-by-step explanation:

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until the concentration is uniform. This process occurs because molecules are in constant motion and collide with each other. Over time, more molecules will be propelled into the less concentrated area, resulting in a net movement from more tightly packed areas to less tightly packed areas.