If the pressure exerted on a sample of gas is increased from 0.89 atm to 3.56 atm what is the initial volume of the gas in ml if the final volume was 20.0 ml?

How will the emission of an alpha particle affect the atomic number of an atom

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

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.