The escape speed from the Moon is much smaller than from Earth and is only 2.38 km/s. At what temperature would neon atoms (with an atomic mass equal to 20.18 g/mol) have an average speed vrms equal to the Moon's escape speed

Iknow the answer is a but i don't know why

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".