How many grams of HNO3 is needed to make 1.5 L of a 3 M solution of HNO3? Show work

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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?

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid