Brownian motion and gas diffusion give evidence for the particulate nature of matter. Which row shows an example of Brownian motion and how molecular mass controls the rate at which gas molecules diffuse?
- Apollen grains in water are seen to move randomly; heavier gas molecules diffuse more quickly
- Bpollen grains in water are seen to move randomly; lighter gas molecules diffuse more quickly
- Csalt dissolves faster in hot water than in cold water; heavier gas molecules diffuse more quickly
- Dsalt dissolves faster in hot water than in cold water; lighter gas molecules diffuse more quickly