4. Look at this model of a molecule of ammonia. In this model, the blue sphere represents an atom of
nitrogen, and the smaller gray spheres represent
atoms of hydrogen. If you wanted to explain the
structure of this molecule, would
you use
this
model or the description on the previous screen?
Why?
Type your answer here

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?

Which of these is an intensive property of a substance

The half-life of a certain element is 100 days. how many half-lives will it be before only one eighth of this elementremains?