Chemistry 400 Homework 9, Chapter 9 I. Multiple Choice 1. In the Lewis structure for formic acid, HCOOH, how many bondin

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Chemistry 400 Homework 9 Chapter 9 I Multiple Choice 1 In The Lewis Structure For Formic Acid Hcooh How Many Bondin 1 (156.91 KiB) Viewed 58 times

Chemistry 400 Homework 9, Chapter 9 I. Multiple Choice 1. In the Lewis structure for formic acid, HCOOH, how many bonding pairs and lone pairs of electrons are present? (A) 4 bonding, 2 lone (B) 4 bonding, 5 lone (C) 5 bonding. O lone (D) 5 bonding, 4 lone 2. Which ionic compound has the largest lattice energy? (A) LiF (B) Beo (C) KBr (D) Cas 3. When 1.0 mole of H2O2 decomposes to form H20 and O2, 10kJ of energy is released. Given the bond energies below, what is the bond energy of the O-o single bond in H2O2? Bond Bond Energy, kJ-mol HO 463 0-0 498 (A) +395 kJ mol! (C) +146 kJemol (B) +249 kJemol (D) +103 kJ.mol- 4. Which ion has the longest N-O bond? (A) NO, (B) NO, (C) NO (D) NO 5. How many distinct C-O bond lengths are present in the oxalate ion, C20?? (A) (B) (C) 3 (D) 4 6. In which molecule are there two distinct sets of sulfur-fluorine bond lengths? (A) SF (B) OF (C) SF 7. In the Lewis structure for the selenite ion, ScO;?, how many lone pairs are around the central atom? (A) (B) (C) 2 (D) 3 0 8. Using the bond dissociation enthalpies (BDE) in the table, estimate AHⓇ for the disproportionation of hydrazine described in the equation below. 3 N2H4(g) → 4 NH3(g) + N2(g) Bond BDE, KJ.mol- Bond BDE, KJ-mol- N-N 163 NEN 944 NON 409 N-H 388 (A) +283 kJ.mol-1 (C) -393 kJ-mol- (B) -283 kJ mol- (D) 455 kJ.mol- 9. The lattice energy for ionic crystals increases as the charge on the ions and the size of the ions A. increases, increases D. decreases, decreases B. increases, decreases C. decreases, increases E. None of these is generally correct. 10. Choose the best Lewis structure for OCI. А Ciri-c: c.:(i=o=ci: E.:01-ö-ö: B. 0-ö=c: DCI=o=c: 1 11. Choose the best Lewis structure for CH2Cl . A. B. C. H-0-0-0-H H H-H-0-0-c: ci- -ä: