Ch. 9 Worksheet
Supplemental Instruction
Iowa State University
Leader:
Tina
Course:
Chem 177
Instructor:
Dr. Appy
Date: 4/8/15
1. How many sigma and pi bonds does are in a molecule of ethyne (acetylyene), HCCH?
a) 1 sigma, 1 pi
b) 2 sigma, 1 pi
c) 2 sigma, 3 pi
d) 3 sigma, 2 pi
2. Which bonds are formed by a Carbon atom with sp2 hybridization?
a) 4 pi bonds
b) 2 pi bonds and 2 sigma bonds
c) 1 pi bonds and 3 sigma bonds
d) 4 sigma bonds
3. How many sigma bonds does propyne have? (What’s the formula of propyne?)
a) 2 b) 4 c) 6 d) 8
4. In the Lewis structure for SCl2O, the formal charges are: on S, on the Cl atoms, and on O.
a) 0, 0, 0 b) +1, 0, –2 c) +1, 0, –1 d) +4, –1, –2 e) –1, 0, +1
5. Based on VSEPR theory, which should have the smallest XAX bond angle?
6. The molecular geometry of phosphorus trichloride PCl3 is .
a) trigonal planar b) trigonal pyramidal c) tetrahedral
d) bent e) T–shape
7. What is the approximate Cl–P–Cl bond angle in phosphorus trichloride PCl3?
a) 90˚ b) 109.5˚ c) 120˚ d) 180o
