Cupric chloride, CuCl2, when heated to 100*C is dehydrated. If 0.235 g of CuCl2 · xH2O gives 0.185 g of CuCl2 on heating, what is the value of x?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

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.