Which element(s) is/are not balanced in this equation? pb(no3)2 + 2 kcl → pbcl2 + kno3 k k, n, and o n and o pb, n, and o

Ineed with a, b, c, d, and e on the long answer

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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?