CHM111-exam2-2009

CHM111-exam2-2009 - Exam #2 Name _ Read the instructions...

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1 Exam #2 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. NOTE: All Lewis structures should include lone pairs and any non-zero formal charges. Table 1. Potentially useful equations. Table 2. Fundamental physical constants 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 mol -1 Table 3. Infra-red absorption peaks of commonly observed functional groups. Group Vibration Range of Absorption in Wavenumbers (cm -1 ) O-H Stretching 3700-3200 Broad, strong N-H Stretching 3500-3300 Sharp C-H Stretching 3300-2700 C-C triple bond Stretching 2200-2000 Weak C=O Stretching 1900-1640 Strong, sharp C=C Stretching 1700-1580 N-H Bending 1650-1490 C-H Bending 1475-1300 O-H Bending 1450-1200 C-O Stretching 1300-900 E = " 2 k 2 e 4 # 2 m n 2 h 2 E = hv = h " c r = n 2 h 2 4 ke 2 " 2 m " ( m # v ) # " x $ h 4 % = h m # v PE = M " k " q 1 " q 2 r
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2 1) Several compounds have the molecular formula C
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CHM111-exam2-2009 - Exam #2 Name _ Read the instructions...

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