Which statement concerning molecules in a gas is correct?
- AIn Brownian motion experiments, the molecules can be seen moving randomly in all directions.
- BThe pressure exerted by a gas is caused by molecules bouncing against each other and changing kinetic energy.
- CThe pressure exerted by a gas is caused by molecules rebounding from the walls of a container and changing momentum.
- DWhen the average speed of the molecules in a closed container increases, the density must also increase.