Practice Exam 2C - Practice Exam 2C 1 At-100 C all of the...

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Practice Exam – 2C 1. At  100 ºC all of the following are liquids. In which of the liquids there is going to be significant hydrogen  bonding?  1: CH 3 F       2: CH 3 NH 2        3: CH 3 OH       4: CH 3 Br  A. 1 only B. 2 only C. 1 and 4 D. 2 and 3 E. All liquids will have significant hydrogen bonding Points Earned: 0/1 Correct Answer: D Your Response: E 2. Which of the following molecules is  incorrectly  paired with its molecular geometry? I. AsF 6  octahedral II. H 2 O trigonal pyramidal III. XeF 2  trigonal planar A. I only B. II only C. III only D. I and III E. II and III Points Earned: 1/1
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Correct Answer: E Your Response: E 3. Which element A will result in a trigonal pyramidal structure for the neutral molecule with formula AF 3 ? A. C B. O C. Xe D. B E. N Points Earned: 0/1 Correct Answer: E Your Response: A 4. What are the correct electron domain and molecular geometries, respectively, for XeF 4 ? A. octahedral, square planar B. square planar, octahedral C. trigonal bipyramidal, seesaw D. seesaw, trigonal bipyramidal E. tetrahedral, tetrahedral Points Earned: 1/1 Correct Answer: A Your Response: A
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5. What is C-S-C bond angle in ethyl methyl thioether, show above? A. exactly 120º B. slightly more than 120º C. exactly 109.5º D. slightly less than 109.5º E. nearly 180º Points Earned: 0/1 Correct Answer: D Your Response: E 6. Which one of the following molecular geometries  cannot  result from the trigonal bipyramidal electron-domain  geometry? A. Square pyramidal B. Trigonal bipyramidal C. Seesaw D. T-shaped E. Linear Points Earned: 1/1 Correct Answer: A Your Response:
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A 7. A certain organic compound was burned, producing 1.481 g of CO 2  and 0.303 g of H 2 O. The mass of the  original sample was 0.438 g. What is the empirical formula of the compound?  A. CHO B. CH 2 C. CH D. C 2 H 2 O E. C 2 H 3 Points Earned: 0/1 Correct Answer: C Your Response: D 8. Hydrocarbons with 6 carbons in their longest chain have a parent name "hex" for "six". Which hydrocarbon has  the same empirical formula as cyclohexane? A. benzene B. hexane C. hexyne D. hexene E. none of the above Points Earned: 1/1 Correct Answer: D Your Response: D 9.
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How many   bonds and   bonds are present in propyne, CH σ π 3 CCH?
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