A balloon is filled with 1 mole of helium gas at 100 kPa of pressure and a
temperature of 300 K. What is the approximate volume of the balloon? (The
ideal gas law and gas constant are given below.)
PV = nRT
R=8.314 m. Pa/
mol K

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

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?