Brainllest :) Explain how adding sand to a soda can will affect its density. Be sure to use the terms mass and volume.

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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?

What are fossils of organisms that existed over a wide area but only for a limited time period called?