A compound's empirical formula is CzHs. If the formula mass is 58 amu, what is the molecular formula?

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

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.