A vinegar solution of unknown concentration was prepared by diluting 10.00 mL of vinegar to a total volume of 50.00 mL with deionized water. A 25.00 mL sample of a diluted vinegar solution required 20.24 mL of 0.1073 M NaOH to reach the titration equivalence point. Calculate the concentration of acetic acid (in M) in the original vinegar solution (before dilution)

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.