The mass of H202 is measured at 36 g. After decomposes, the amount of water left in the beaker is 12 g. What is the mass of oxygen released?

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 mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Draw the lewis dot structure for each of the following polyatomic ions