Why do you need to understand safe procedures in the science classroom and laboratory?

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 chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.

What are the coefficients that will balance the skeleton equation below? n2 + h2 → nh3