Please help and show work, go to link

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?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false