Practice Exam 1 - CHM 2210 Section 4830 Fall 2006 Exam 1B...

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CHM 2210 – Section 4830 Name________________________________ Fall 2006 Exam 1B UFID________________________________ 1. (8 pts.) Draw a Lewis structure and three dimensional structure of the following compound (CH 3 OCH 2 CCCH 2 CHO) 2. (5 pts.) Draw the line angle structure of 4-chloro- trans -1,2-dimethylcyclopentane. 3. (10 pts.) Draw the line angle formulas of the following condensed structural formulas: CH 2 CHCH 2 CH 2 OCH 2 CHO HOCH 2 CH 2 NH(CH 3 ) 2 4. (5 pts.) Boron trifluoride (BF 3 ) is a neutral molecule but is generally sold as boron trifluoride-diethyl etherate (the structure shown below). Write the formal charge of oxygen and boron in the space provided. O BF F F .. O_______ B_______ Circle the one concept that best explains why boron trifluoride would be more stable in this form. resonance, electronegativity of oxygen, Hund’s rule, boiling point, octet rule
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5. (6 pts.) The molecule shown to the right is called allene. C 1 C 2 C 3 H H H H a) How many sigma bonds does C-1 have_______? How many pi bonds_______? b) How many sigma bonds does C-2 have_______? How many pi bonds_______? c) What is the hybridization of C-1________? C-2________? 6. (13 pts.) Each of the compounds below contains 14 non-hydrogen atoms, making them about the same
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Practice Exam 1 - CHM 2210 Section 4830 Fall 2006 Exam 1B...

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