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HOMEWORK CHAPTER 8 KEY

HOMEWORK CHAPTER 8 KEY - HOMEWORK CHAPTER 8 KEY 30 Indicate...

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HOMEWORK CHAPTER 8 KEY 30. Indicate the bond polarity (show the partial positive and partial negative ends) in the following bonds: a. C-O b. P-H c. H-Cl d. Br-Te e. Se-S 40. For each of the following groups, place the atoms and/or ions in order of decreasing size. a. V, V 2+ , V 3+ , V 5+ b. Na + , K + , Rb + , Cs + c. Te 2- , I - , Cs + , Ba 2+ d. P, P - , P 2- , P 3- e. O 2- , S 2- , Se 2- , Te 2- 46. Use the following data to estimate Δ H o f for magnesium fluoride: Mg (s) + F 2 (g) Æ MgF 2 (s) Lattice Energy -3916 kJ/mol First ionization energy of Mg 735 kJ/mol Second ionization energy of Mg 1445 kJ/mol Electron affinity of F -328 kJ/mol Bond energy of F 2 154 kJ/mol Enthalpy of sublimation of Mg 150. kJ/mol

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62. Consider the following reaction: A 2 + B 2 Æ 2 AB Δ H = -285 kJ The bond energy for A 2 is one-half the amount of the AB bond energy. The bond energy of B 2 = 432 kJ/mol. What is the bond energy of A 2 ? 68. Write Lewis Structures that obey the octet rule for each of the following molecules and ions. (In each case the first atom listed is the central atom.) a. POCl 3 SO 4 2- XeO 4 PO 4 3- ClO 4 - b. NF 3 SO 3 2- PO 3 3- ClO 3 -
c. ClO

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HOMEWORK CHAPTER 8 KEY - HOMEWORK CHAPTER 8 KEY 30 Indicate...

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