An atom of phosphorus has a mass of 5.143 X 10-23 g. How many atoms of phosphorus are in 2.00 g of phosphorus? (Give your answer in scientific notation.)

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.