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set 6

8 Pages
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Department
Chemistry
Course Code
CH110
Professor
Quinn Major

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Problem set #6 1. Which of the following represent the Lewis structure for S2? A) B) C) D) E) 2. Which of the following statements is TRUE? A) A covalent bond is formed through the transfer of electrons from one atom to another. B) A pair of electrons involved in a covalent bond are sometimes referred to as "lone pairs." C) It is not possible for two atoms to share more than 2 electrons. D) Single bonds are shorter than double bonds. E) A covalent bond has a lower potential energy than the two separate atoms. 3) Which of the following statements is TRUE? A) An ionic bond is much stronger than most covalent bonds. B) An ionic bond is formed through the sharing of electrons. C) Ionic compounds at room temperature typically conduct electricity. D) Once dissolved in water, ionic compounds rarely conduct electricity. E) None of the above are true. 4.Which of the following reactions represent the lattice energy of Li2O ( H° )? latt + 2 A) Li2O(s)  2 Li (g) O (g) B) 2 Li (aq) O (aq) Li O(s) 2 C) 2 Li (g) O (g) Li O(s) 2 + 2 D) Li2O(s) 2 Li (aq) O (aq) E) 2 Li(s) O (g) Li O(s) 2 2 2 5. Which of the following reactions represent the lattice energy of CaS ( )? latt A) Ca(s) S(s) CaS(s) B) CaS(s) Ca(s) S(s) 2+ 2  C) Ca (aq) S (aq) CaS(s) 2+ 2  D) Ca (g) S (g) CaS(s) E) CaS(s) Ca (aq) S (aq) 6. ) Place the following elements in order of increasing electronegativity. K Cs P A) P < K < Cs B) K < P < Cs C) Cs < P < K D) Cs < K < P E) P < Cs < K 7. ) Place the following elements in order of decreasing electronegativity. S Cl Se A) Se > S > Cl B) Cl > Se > S C) Se > Cl > S D) S > Cl > Se E) Cl > S > Se 8. Choose the bond below that is least polar. A) P-F B) C-Br C) C-F D) C-I E) C-Cl 9. Choose the bond below that is most polar. A) H-I B) H-Br C) H-F D) H-Cl E) C-H 10. Using periodic trends, place the following bonds in order of increasing ionic character. S-F Se-F O-F A) Se-F < S-F < O-F B) S-F < Se-F < O-F C) O-F < Se-F < S-F D) Se-F < O-F < S-F E) O-F < S-F < Se-F 11) Using periodic trends, place the following bonds in order of decreasing ionic character. Sb-Cl P-Cl As-Cl A) Sb-Cl > As-Cl > P-Cl B) As-Cl > Sb-Cl > P-Cl C) Sb-Cl > P-Cl > As-Cl D) P-Cl > As-Cl > Sb-Cl E) Sb-Cl > P-Cl > As-Cl 12.Which molecule or compound below contains a pure covalent bond? A) Li2CO 3 B) SCl 6 C) Cl2 D) PF 3 E) NaCl 13) Which molecule or compound below contains a polar covalent bond? A) C H 2 4 B) ZnS C) LiI D) NCl 3 E) AgCl 14) Which molecule or compound
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