What do you call the curved, upper surface of water that commonly appears when using a graduated cylinder? . describe what causes this? .

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?

What is the percentage of hydrogen in nitrogen trihydride

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?