Chapter 9 & 10 Makeup
Student: ___________________________________________________________________________
1. Draw a Lewis dot structure obeying the octet rule for ClO3-.
2. Write the Lewis structure of HNO3.
3. Write a Lewis structure for NO3-.
4. Write the Lewis Structure for AlCl3.
5. According to the VSEPR theory, the geometrical structure of PF5 is
6. Use VSEPR theory to predict the molecular geometry of H3O+ (hydronium ion).
7. Use VSEPR theory to predict the molecular geometry of CO32-.
8. The shape of the CS2 molecule is best described as
A. trigonal planar.
B. tetrahedral.
C. linear.
D. trigonal pyramidal.
E. bent.
9. According to the VSEPR theory, the molecular shape of beryllium chloride is
A. trigonal pyramidal.
B. bent.
C. tetrahedral.
D. trigonal planar.
E. linear.
10. According to the VSEPR theory, the molecular shape of boron trichloride is
A. tetrahedral.
B. trigonal pyramidal.
C. trigonal planar.
D. bent.
E. linear.
11. According to the VSEPR theory, which one of the following species should be linear?
A. BF3
B. H2CO
C. H2S
D. HCN
E. SO2
12. Which of these compounds is most likely to be ionic?
A. CO2
B. ICl
C. CS2
D. KF
E. CCl4
13. Which of these elements is the least electronegative?
A. V
B. P
C. I
D. Sr
E. Ni
14. Classify the
A. polar covalent
B. nonpolar covalent
C. ionic
bond in CH3OH as ionic, polar covalent, or nonpolar covalent.
15. The total number of bonding electrons in a molecule of formaldehyde (H2CO) is
A. 3.
B. 6.
C. 18.
D. 4.
E. 8.
16. Which of these choices is a correct Lewis structure for ozone, O3?
A.
B.
C.
D.
E.
17. The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is
A. 1.
B. 3.
C. 4.
D. 2.
E. none of these.
18. The formal charge on the bromine atom in BrO3- drawn with three single bonds is
A. -1.
B. 0.
C. +1.
D. -2.
E. +2.
19. What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O)?
A. -2
B. -1
C. +2
D. 0
E. +1
20. What is the formal charge on sulfur in the best Lewis structure for the SCN- (thiocyanate) ion?
A. 0
B. +1
C. +2
D. -2
E. -1