Exam110_answers - Exam # 1 Chemistry 2401 September 30,...

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Exam # 1 Chemistry 2401 – September 30, 2010 (20) I. Answer each of the following by placing the correct number in the space provided. In some cases it may also be necessary to designate a sign. _ 5 _ A. The number of signals in the 13 C NMR spectrum of 2,2,4-trimethylpentane. _ 9 __ B. The number of protons in a fluoride anion (F -1 ). _ 44 C. The number of neutrons in a 79 Br atom. _ 3 __ D. The number of pi bonds in acrylonitrile (CH 2 CHCN). _ 24 _ E. The number of electrons in a formate anion (CHO 2 -1 ). __ 3 _ F. The number of half-filled atomic orbitals in an atom of phosphorus (P). __ 4 _ G. The number of covalent bonds to a nitrogen atom with a formal charge of +1. __ 9 _ H. The total number of carbon atoms in a molecule of 2,4-dimethyl-3-ethylpentane. __ 3 _ I. The number of tertiary carbon atoms in 2,4-dimethyl-3-ethylpentane. __ 2 _ J. The number of hydrogen atoms bonded to a secondary carbon atom in a hydrocarbon. (33) II. Multiple Choice: Circle the letter corresponding to the correct response. 1. Which of the following contains only sp hybridized carbon atoms? C A. B. C. D. C C H H H H C C H C H H H C C H H C C H H H H H H 2. Which of the compounds in question 1 is the strongest acid? C A. B. C. D. C C H H H H C C H C H H H C C H H C C H H H H H H 3. Cyclopropane has a relative high heat of combustion due to A A. torsional and angle strain B. torsional and steric strain C. steric and angle strain D. all three types of strain 4. Which of the following does not have a dipole moment?
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Exam110_answers - Exam # 1 Chemistry 2401 September 30,...

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