Example best shows that the chemistry of water is to plants? water’s polarity produces a high density, which allows water to move to the leaves. water’s bent shape causes a slow passage of nutrients up to the leaves of plants. water’s polarity causes cohesion that pulls other water molecules up through a plant. water’s bent shape reduces its own passage through the cell membranes of roots.

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.