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Exam 2 blue key - Examination#2 CH101 Section 003 Dr T...

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Examination #2 March 17, 2008 CH101 Section 003 Dr. T. Brent Gunnoe Your Name: ____Blue key __________________________ INSTRUCTIONS 1) The answer sheet is double sided and is separate from the exam. BE CERTAIN TO PUT YOUR NAME ON THE ANSWER SHEET. When you are finished, turn in your exam and the answer sheet. THE ONLY ANSWERS THAT WILL COUNT ARE THOSE ON YOUR ANSWER SHEET. Your exam will not be returned, only the answer sheet. 2) You may use the back of each page for scrap paper. 3) Unless you indicate otherwise via an email to Prof. Gunnoe, your exam will be returned in class by placing in a folder with the first letter of your last name. 4) TURN OFF YOUR CELL PHONE! 5) When you complete the exam, quietly turn in all pages at the front of the room.
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1. Which bond is the most polar (2 points)? Write the correct answer. Al-Cl Al-P Al-S Al-Si 2. Which bond dipole(s) show(s) the correct bond polarity (there may be more than one correct answer; 2 points)? On the answer sheet, circle all correct answers. N C B C Cl F Cl F 3. Indicate the type of bond ( σ,σ∗, π, π∗ or none) for each orbital overlap depicted below (2 points each): I. II. III. 4. Using molecular orbital theory, if 2 atoms of nitrogen form a bond, how many molecular orbitals will result (2 points)? 5. Answer the questions by filling in the correct value for the molecule on the right (2 points each): I) Approximate bond angle of α II) The hybridization of atom labeled "2" III) The shortest carbon-carbon bond (A, B, C or D) IV) The hybridization of atom labeled "1" V) Approximate bond angle of β VI) The bond order of the bond labeled "B" 6. Classify each molecule below as non-polar or polar (part a) and circle all intermolecular forces (part b, see answer sheet) that exist (2 points each response, no partial credit): I. II.
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