The graph represents the reaction 2H2 +02 = 2H20 as it reaches equilibrium. Based on the graph, which two statements about this reaction are true? A. At point 2, the concentrations of H20, 02, and H2 are all changing toward their equilibrium concentrations.

B. The rate of formation of products is equal to the rate of formation of reactants only after point 4.

C. After point 2, the rate of formation of products is equal to the rate of formation of reactants.

D. At point 1, more reactants are converted to products than products are converted to reactants.

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.