Explain how molecules in different states of matter move?

Fast in gas
don't move in solid 
alittle freely in liquid

Gas
-Gas assumes the shape and volume of its container. Particles can move past one another.
-Gas is compressible with lots of free space between particles.
- Gas flows easily, particles can move past one another.
Liquid
- liquid assumes the shape of the part of the container which it occupies. Particles can move or slide past one another.
- liquids are not easily compressible.
- liquids have little free space between particles.
- liquids flow easily, particles can move or slide past one another.
Solid
- solids retain a fixed volume and shape. They are rigid and particles lock into place.
- solids are not easily compressible, there is little free space between particles.
- solids do not flow easily. Their rigid particles cannot move or slide past one another.

I also recommend looking up a diagram to help you retain a more clear understanding how each element generally moves.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.