CHM111-exam1-2009

CHM111-exam1-2009 - Exam #1 Name _ Read the instructions...

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1 Exam #1 Name ___________________ Read the instructions carefully and follow them. Show your calculations to receive maximum credit. Significant figures should be correct. You have until 8:50 am to complete this exam. Formulas and constants: c = v λ E = hv = h c E = 2 k 2 e 4 π 2 m n 2 h 2 r = n 2 h 2 4 ke 2 2 m = h m v Δ ( m v ) ⋅ Δ x h 4 h = 6.63 x 10 -34 J s c = 3.00 x 10 8 m s -1 k = 8.99 x 10 9 J m C -2 m e = 9.11 x 10 -31 kg e = -1.60 x 10 -19 C Avogadro’s number = 6.02 x 10 23 atoms mol -1
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1) Geologists find a large stone, and want to determine if it consists of a compound or if it is a mixture. They take several samples of the stone and perform mass spectrometry, obtaining the spectra shown below. a) Is the specimen (the entire stone) one pure compound or a mixture? Why? b) How would the spectra differ for the type of matter not chosen in part a? Sketch examples of what the two spectra might look like. O
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This note was uploaded on 10/30/2010 for the course CHM 111 taught by Professor Stanitski during the Fall '08 term at F & M.

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CHM111-exam1-2009 - Exam #1 Name _ Read the instructions...

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