Chapter 2.1, Problem 1PTS

Draw a Lewis structure for each of the following: a. N2H4 b. CO3 2 - c. N2H2 d. CO2 e. HOCl

Choose the correct arrangement of the following bonds in terms of increasing ionic character.  H-C, H-Cl, Na-Cl, H-Br, K-F       Select one: a.   H-C < H-Br < H-Cl < Na-Cl  < K-F   b. K-F < Na-Cl < H-Cl < H-C < H-Br c.   H-C < Na-Cl < H-Br< H-Cl < K-F   d.   H-Cl < H-C < K-F < Na-Cl < H-Br   e.   H-Br < H-C < Na-Cl < H-Cl < K-F

Select the strongest bond in the following group. Select one: а. C-S b. C-F С. C =N d. C-O e. C=C

Why is the HNH angle in NH3 smaller than the HCH bond angle in CH4? Why is the HNH angle in NH4+ identical to the HCH bond angle in CH4?

7. Which bond is correctly labeled with a dipole arrow? •← + •f + + C-H O-H N-H C-Cl C-C a. b. C. d. a. structure a b. structure b c. structure c d. structure d e. structure e

1. What is the relationship between the following compounds? H :0: H H:0: H H-C=C-C-C-C-H H-C-C-C=Ċ-H H HH H. H-C-H B. constitutional isomers C. the same structure A. isotopes D. composed of different elements E. no relationship 2. What is the correct Lewis structure for HN3, including the formal charges? CIH

Element X has four valence electrons, Element Y has one valence electron, and Element Z has six valence electrons. Which of the following is the best Lewis structure for XZY2? :X : YZY A Structure D Structure B Structure C :X: Structure A YZY B The best structure is not shown :Z: YXY с :Z: Y-X-Y D

Which of the following C-C bonds is the shortest? A. в D E Select one: O a. A O b. B O c. C O d. D О е. Е

7. Which bond is correctly labeled with a dipole arrow? + + C-H O-H N-H C-Cl C-C a. b. C. d. e. a. structure a b. structure b c. structure c d. structure d