Two of the isotopes of carbon, carbon-12 and carbon-13, have masses of 19.93 3 10227 kg and 21.59 3 10227 kg, respectively. These two isotopes are singly ionized (1e), each given a speed of 6.667 3 105 m/s. The ions then enter the bending region of a mass spectrometer where the magnetic fi eld is 0.8500 T. Determine the spatial separation between the two isotopes after they have traveled through a half-circle.

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

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.

What are several ways to reduce the effect of friction