HW04 Quy

# HW04 Quy - perlick(app582 HW04 quy(50970 This print-out...

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perlick (app582) – HW04 – quy – (50970) 1 This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points Which oF the Following is the correct Lewis Formula For oxygen (O 2 )? 1. O b b b b b b b b b b O 2. b b b b b b b b O b b b b b b O 3. b b b b b b O b b b b b b O correct 4. b b b b b b O b b b b O 5. b b b b b b O b b b b b b O 6. b b b b b b b b b b O O 7. O b b O 8. O b b b b b b b b O 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 b b b b b b O b b b b b b O 002 10.0 points How many lone pairs oF electrons are on nitrogen in N± 3 ? 1. one correct 2. none 3. twenty 4. ten 5. Four 6. thirteen 7. three 8. two Explanation: The Lewis structure is N b ± ± b b ± 003 10.0 points How many unshared electrons and bonding electrons exist around the central atom in ozone, O 3 ? 1. Four; Four 2. one; six 3. two; two 4. none; two 5. two; six correct 6. one; three 7. Four; three 8. three; six 9. zero; eight Explanation: O O O O O b b O 004 10.0 points Which oF the Following is the correct Lewis Formula For acetylene (ethyne, C 2 H 2 )? 1. b b b b b b b b b b b b b b b b b b b b H C C H

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perlick (app582) – HW04 – quy – (50970) 2 2. H C C b b b b H 3. H b b b b b b C C b b b b H b b b b b b 4. H C C H correct 5. b b b b b b b b H C C H 6. b b b b b b H C C H 7. b b b b b b b b b b b b H C C H 8. b b b b b b b b b b b b b b H C C H 9. C C H H b b b b b b b b b b 10. b b b b b b b b b b b b b b b b b b 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 Fuoride (Cl±)? 1. ± b b b b b b b b Cl 2. ± b b b b b b Cl 3. b b b b ± b b b b b b Cl 4. ± b b b b b b b b Cl 5. ± Cl 6. b b b b b b b b ± Cl 7. b b b b ± b b b b b b Cl 8. b b b b b b ± b b b b b b Cl correct 9. b b b b ± Cl 10. b b b b b b b b ± Cl Explanation: The Lewis formula for chlorine Fuoride (Cl±) is b b b b b b ± b b b b b b Cl 006 10.0 points Which of the following contains exactly one unshared pair of valence electrons? 1. SiH 4 2. C 2 H 4 3. H 2 S 4. PH 3 correct 5. NaCl Explanation: The PH 3 molecule contains exactly 1 un- shared pair of valence electrons: P ·· H H H
perlick (app582) – HW04 – quy – (50970) 3 You can check this structure for correctness by verifying that each atom has the correct

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HW04 Quy - perlick(app582 HW04 quy(50970 This print-out...

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