What is the difference between "4 p" and "p4"? a) there is no difference, they both represent the same thing. b) 4 p represents four molecules and p4 represents four atoms. c) p4 represents four atoms chemically bonded together and 4 p does not. d) 4 p represents phosphorus atoms that are bonded together chemically and p4 represents one molecule

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Explain that newton first law,second law and third law of motion?

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.