When an electron moves from a higher energy level to a lower energy level in an atom, Choose one: A. the atom is ionized. BY. a continuous spectrum is emitted. C. a photon is absorbed. D. a photon is emitted.

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?

If i add water to oil what will happen

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?