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A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. The ions all have the same charge and are accelerated through the same potential difference before entering the magnetic field. The beryllium and aluminum lines are separated by 2.350 cm on the photographic plate, and the unknown element makes a line between them that is 1.454 cm from the beryllium line.
(a) What is the mass of the unknown element?
(b) Identify the element, using its chemical symbol. (Note that there may be more than one correct answer.)
Rawls and Nozick take radically different approaches to the question: what is the proper role of the federal government.
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The doctrine of judicial review
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How are urinalysis, blood urea nitrogen, and serum creatinine values used to assess kidney function?
Do you think we should have a full-time with annual sessions, well paid, professional Texas Legislature? Why or why not? Should the legislators be prohibited from becomming lobbyists for a time after they leave the legislature?
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