(a) what is meant by diffusion? give one example of diffusion in gases. (b) why do gase diffuse very fast?
(d) Name two gases of air which dissolve in water by diffusion. what is the importance of this process in nature?
please answer it fast

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Plz mark brainliest 30 points1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s.2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?