Explain how the size of molecules affects diffusion.

Step 1: Explain how the size of molecules affects diffusion. a) Size of molecules: Smaller molecules diffuse faster than larger molecules. This is because smaller molecules have less mass and encounter less resistance as they move through a medium, allowing them to spread out more quickly. Step 2: Explain how the type of medium affects diffusion. b) Type of medium: Diffusion occurs fastest in gases, slower in liquids, and slowest in solids. This is due to the arrangement and movement of particles in each state: particles in gases are far apart and move freely, in liquids they are closer but still mobile, and in solids they are tightly packed and vibrate in fixed positions. a) Smaller molecules diffuse faster; larger molecules diffuse slower. b) Diffusion is fastest in gases, slower in liquids, and slowest in solids. Last free one today — make it count tomorrow, or type /upgrade for unlimited.