When you see liquid water physically change into ice, what is happening to the motion of its particles?

What is important to study for nios grade 12 chemistry? i have only one month left.

How do scientists think that gravity affected the formation of our solar system?

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h