Explain how you determine molar mass of ca(no3)2

What three natural resources are found in the great lakes region

Why are people not able to scuba dive in the deep part of the ocean

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?