According to the assumptions upon which most reaction mechanisms are based, collisions must occur in order for a chemical reaction to occur, but: a. energy is destroyed in these collisions. b. some molecules react with each other without colliding. c. there are very few collisions every second. d. not every collision results in a reaction. e. only certain collisions will increase the energy of the reaction.

Which best explains why an iceberg floats?

Compare and contrast physical changes with chemical changes.

Plz mark brainliest 30 points 1) 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?