5 points
Which group of organisms, some of which were preserved in fossils in
early Paleozoic rocks, are still in existence today? *
Brachiopods
grapolites
euryterids
trilobites

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?

Asolid that forms and separates from a liquid mixture is called

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d