2. Serena mixed two samples together: a
gray solid that smells like flowers and a gray
solid that smells like bleach. She analyzed
the results and found two ending
substances. One of the ending substances
was a white solid. This ending substance is
made up of the repeating group of atoms
shown above. Which of the diagrams to the
left shows the repeating groups of atoms
that make up the samples Serena mixed
together?

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?