Classify the following as either elements, compounds, homogeneous mixtures (solutions) or heterogeneous mixtures: a) copper (II) sulfate b) Kool Aid c) wood d) plastic e) lined paper f) gadolinium

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?

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

How hot is the suns corona? (integrated science)