Write the number of atoms of each element found in one unit of the compound:
a.) potassium iodide, ki
b.) sodium sulfide, na2s
c.) silicon dioxide, sio2
d.) carbonic acid, h2co3

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?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as