Ammonium chloride has the following chemical formula: NH4Cl

What atoms are in one formula unit of ammonium chloride?
Select one:

Four nitrogen atoms, four hydrogen atoms, and four chlorine atoms.

One nitrogen atom, four hydrogen atoms, and four chlorine atoms.

Four nitrogen atoms, four hydrogen atoms, and one chlorine atom.

One nitrogen atom, four hydrogen atoms, and one chlorine atom.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied