How do all the reactions differ? check all that apply. check all that apply. there are two steps in the reaction. the first step is addition of an electrophilic proton (h+) to the carbon of the ch2 group. the nucleophile that adds to the tert-butyl carbocation. there are three steps in third and fouth reactions and two steps in the first and second reactions. there are three steps in the reaction.]

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.