A test solution of aluminum nitrate, Al (NO3)3, must be made that contains 20.0 mg/cm3 of the metal ion. If 1500.0 cm3 of the solution is desired, how many grams of the solute with mass measured as Al(NO3)3 • 9H2O must be used? What is the molarity of the solution? What is the molarity of the aluminum ion? What is the molarity of the nitrate ion?

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.