6) Suppose you have 100.00 ml of a solution of a dye and transfer 2.00 ml of the solution to a 100.00 ml volumetric flask. After adding water to the 100.00 ml mark, you take 5.00 ml of that solution and again dilute to 100.00 ml. If you find the dye concentration in the final diluted sample is 0.000158 M, what was the dye concentration in the original solution

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.