1. Which of the following is trigonal planar?
A. boron trifluoride, BF3
B. methyl anion, CH3
C. methane, CH4
D. ammonia, NH3
2. Which atomic orbitals overlap to form the C=O bond of 2-propanone?
A. C sp3 + O sp2
B. C sp2 + O p
C. C sp2 + O sp2
D. C sp3 + O sp
Draw these orbitals here:
3. Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO]-? Explain.
![612_3.png](https://secure.tutorsglobe.com/CMSImages/612_3.png)
A. 1
B. 2
C. 3
D. 4
Explain here:
4. Identify the condensed formula of the following structure:
![1128_4.png](https://secure.tutorsglobe.com/CMSImages/1128_4.png)
A. (CH3)2CHCHClCH(CH3)2
B. CH3CH(CH3)CHClCH(CH3)2
C. (CH3)2CHCHClC(CH3)3
D. (CH3)3CCHClCH(CH3)3
5. The most stable resonance contributor of this would be:
![2172_5.png](https://secure.tutorsglobe.com/CMSImages/2172_5.png)
A. A
B. B
C. C
D. D
Show all resonance structures and provide explanation for the major contributor:
6. Does the equilibrium of this reaction lie to the left or right? Explain.
![682_6.png](https://secure.tutorsglobe.com/CMSImages/682_6.png)
A) Left
B) Right
C) It cannot be determined.
D) The forward and reverse reactions are equally favored.
Provide explanations here:
7. What should go in the box on the right side of the equation? Show work indicating the direction of equilibrium of the reaction.
![344_7.png](https://secure.tutorsglobe.com/CMSImages/344_7.png)
A) A
B) B
C) C
D) D
E) E
Show work here:
8. Rank the following from the weakest to the strongest base.
A) OH- < Cl- < NH2-
B) Cl- < NH2- < OH-
C) NH2- < OH- < Cl-
D) Cl- < OH- < NH2-
E) NH2- < Cl- < OH-
Provide explanation here: