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H06 Bonding 2 - moreau(mmm4564 H06 Bonding 2 mccord(50970...

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moreau (mmm4564) – H06: Bonding 2 – mccord – (50970) 1 This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Which of the following is the correct Lewis formula for oxygen (O 2 )? 1. O O 2. O O 3. O O 4. O O 5. O O 6. O O 7. O O 8. O O correct Explanation: N = 8 × 2 = 16 A = 6 × 2 = 12 S = N - A = 16 - 12 = 4 There are 4 shared electrons. The remain- ing electrons are placed around the oxygen atoms such that each has an octet. The Lewis dot formula for oxygen (O 2 ) is O O 002 10.0 points How many lone pairs of electrons are on nitrogen in NF 3 ? 1. two 2. one correct 3. ten 4. three 5. four 6. twenty 7. thirteen 8. none Explanation: The Lewis structure is N F F F 003 10.0 points How many unshared electrons and bonding electrons exist around the central atom in ozone, O 3 ? 1. one; three 2. two; two 3. four; four 4. four; three 5. three; six 6. none; two 7. one; six 8. two; six correct 9. zero; eight Explanation: O O O O O O 004 10.0 points Which of the following is the correct Lewis formula for acetylene (ethyne, C 2 H 2 )? 1. H C C H
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moreau (mmm4564) – H06: Bonding 2 – mccord – (50970) 2 2. H C C H 3. H C C H 4. H C C H 5. H C C H 6. H C C H 7. H C C H correct 8. C C H H 9. H C C H 10. H C C H Explanation: The Lewis formula for acetylene (ethyne, C 2 H 2 ) is H C C H 005 10.0 points Which of the following is the correct Lewis formula for chlorine fluoride (ClF)? 1. F Cl correct 2. F Cl 3. F Cl 4. F Cl 5. F Cl 6. F Cl 7. F Cl 8. F Cl 9. F Cl 10. F Cl Explanation: The Lewis formula for chlorine fluoride (ClF) is F Cl 006 10.0 points Which of the following contains exactly one unshared pair of valence electrons? 1. C 2 H 4 2. NaCl 3. H 2 S 4. SiH 4 5. PH 3 correct Explanation: The PH 3 molecule contains exactly 1 un- shared pair of valence electrons: P ·· H H H You can check this structure for correctness by verifying that each atom has the correct
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