Which of the following is necessary to do a complete stoichiometric calculation? (5 points) Add the nuclear masses of the products,
Divide the nuclear masses of the reactants,
Write the complete balanced chemical equation
Write the number of atoms in 1 mole of the product,

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

At element makes up all organic compounds?

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.