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2045EG-Exam3A-Fall2007 no work

2045EG-Exam3A-Fall2007 no work - CHM 2045EG Fall 2007 Exam...

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CHM 2045EG Fall 2007 Exam 3 Form A Please bubble your name, UFID, and form code on your scan-tron. Useful constants include: R = 0.0821 L atm / mol K = 8.314 J / mol K K = o C + 273.15 N A = 6.02 x 10 23 1. The valence MO configuration of O 2 + is ( σ 2s ) 2 ( σ * 2s ) 2 ( σ 2p ) 2 ( π 2p ) 4 ( π * 2p ) n . What is the value of n ? (A) 1 (B) 2 (C) 3 (D) 4 (E) 0 2. Predict the bond order and magnetic properties for O 2 + . (A) 0, paramagnetic (B) 1, paramagnetic (C) 2.5, paramagnetic (D) 2, diamagnetic (E) 1.5, diamagnetic 3. Based on valence bond theory, what are the hybrid orbitals used by the central atom in the ICl 5 ? 4. Consider H 2 CCHCCCN. How many carbon atoms in this molecule is/are sp hybridized? 5. How many bonds does the molecule in #4 above have? π 6. What is the strongest intermolecular (van der Waals) force that must be overcome to convert liquid CH 3 CH 2 CH 3 to a gas? (A) H-bonding (B) Dispersion (C) Dipole-induced dipole (D) Ion-dipole (E) Dipole-dipole
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