The volume of a sample of hydrogen gas was decreased from 14.19l to 7.48 l at constant temperature. if the final pressure exerted by the hydrogen gas sample was 6.14 atm, what pressure did the hydrogen gas exert before its volume was decreased?

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

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?

What is the percent by mass of oxygen in fe2o3