Exam2Spr11FormAwAns - CHM 2045 Exam 2 (Form Code A) March...

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CHM 2045 Exam 2 (Form Code A) March 3, 2011 Instructions: On your scantron sheet enter and bubble in your name, UF ID number (start on the leftmost space and leave any extra spaces blank), and Form Code (see above). You may retain your exam sheet (mark your answers on it and the scantron sheet) and any other sheets. Turn in only your scantron. Potentially Useful Info : h = 6.626x10 –34 kg•m 2 /s (or J•s) ; c = 3.00x10 8 m/s ; R = 1.097x10 7 m –1 ; Rhc = 2.18x10 –18 J ; N A =6.02x10 23 mol -1 ; Electronegativities: O (3.5), F (4.0), Cl (3.0), P (2.1), S (2.5), Si(1.8), H (2.1), Br (2.8), C (2.5) 1.Which bond has the most ionic character? (1) O―Cl (2) S―Cl (3) Si―Cl (4) Cl―Cl (5) Br―Cl 2. What is the electron configuration for the V 3+ ion and is it paramagnetic or diamagnetic? (1) [Ar] 4s 2 3d 3 , paramagnetic (2) [Ar] 4s 2 , diamagnetic (3) [Ar] 4s 2 3d 10 5s 2 , diamagnetic (4) [Ar] 3d 2 , paramagnetic (5) [Kr] 5s 2 , paramagnetic 3. Which of the following does not require a resonance hybrid for its Lewis structure? (1) NO 3 1– (2) BO 3 3– or (3) CS 2 (4) N 2 O (5) SO 4 2– 4. Rank the following in order of increasing size (left → right): Na 1+ , F 1- , Mg 2+ (1) Na 1+ < F 1- < Mg 2+ (2) Mg 2+ < Na 1+ < F 1- (3) F 1- < Na 1+ < Mg 2+ (4) F 1- < Mg 2+ < Na 1+ (5) Na 1+ < Mg 2+ < F 1- 5. Select the false statement below: (1) All halogen atoms are paramagnetic. (2)
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This note was uploaded on 07/15/2011 for the course CHEM 2045 taught by Professor Gower during the Spring '11 term at University of Florida.

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Exam2Spr11FormAwAns - CHM 2045 Exam 2 (Form Code A) March...

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