Exam02answers pg5

Exam02answers pg5 - 24 10 3 32 8 4 24 8 correct 5 24 6 6 32...

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of structure, which has the highest lattice energy? 1. NaBr 2. NaF correct 3. NaI 4. KF 5. NaCl Explanation: Highest charge densities due to small size. 019 (part 1 of 1) 10 points Which of the species NO, BrO, CH + 3 , BF - 4 are radicals? 1. NO and CH + 3 only 2. BrO and BF + 4 only 3. NO and BrO only correct 4. BrO, CH + 3 and BF - 4 only 5. BrO and CH + 3 only 6. NO and BF - 4 only 7. NO, CH + 3 and BF - 4 only Explanation: The Lewis Structures are N O Br O B F F F F - H C H H + Radicals are species with an unpaired elec- tron, so only NO and BrO are radicals. 020 (part 1 of 1) 10 points The Lewis dot structure of CO 2 - 3 has how many total electrons and how many shared electrons? 1. 32; 6 2.
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Unformatted text preview: 24; 10 3. 32; 8 4. 24; 8 correct 5. 24; 6 6. 32; 10 Explanation: The number of total electrons means the number of available electrons. N = 8(4) = 32 A = 2 + 4 + 3(6) = 24 S = 32-24 = 8 021 (part 1 of 1) 10 points How many double bonds are present in the “best” resonance structure of the phosphate ion? 1. 2. 2 3. 1 correct 4. 3 Explanation: The Lewis structure is P O O O O 022 (part 1 of 1) 10 points The VSEPR theory is based on 1. the loss and gain of electrons based on electronegativity. 2. the arrangement of v core electrons in a...
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This note was uploaded on 01/23/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas.

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