CHEMISTRY UNIT 3 PRACTICE QUIZ
1. Explain how distillation is able to separate the components of petroleum.
2. Explain how a covalent bond forms between two chlorine atoms to form a
diatomic chlorine molecule.
3. How many electrons are in each of the energy levels of an calcium atom?
How many valence electrons would it have?
4. Write electron dot diagrams of the following compounds:
H2O 1 N & ? F 3 C alkene
5. Write molecular formulas for the first four alkanes, alkenes and alkynes.
1 carbon 2 carbons 3 carbons 4 carbons
Alkanes
Alkenes
Alkynes
6. List the energy conversions (and name the types of energy) that take place
when electricity is used to power your living room light bulb. Start with the fuel in a natural gas burning power plant run by PG&E.
7. Write structural diagrams for 3 isomers of pentane
Use the conversion factors below to answer the problems 8-12. Be sure to show your steps using the dimensional analysis method.
1 mile = 5280 feet 1 foot = 12 inches 1 inch = 2.54 cm 1 year = 52 weeks
8. How many seconds are left in your life? ---Assume that it's midnight on your
16th birthday and you will live to be 80 years old)
9. The speed limit on the freeway is usually 55 miles per hour. How many meters
per second is this?
10. I watch an average of 12 TV shows a week, each 1/2 hour long. If I was paid
$45 per hour to do this, what would my yearly salary be?
11. Nonane has a heat of combustion of 47.3 kJ per gram of nonane. What would
it's molar heat of combustion be? (Hint: You will need the molecular weight)
12. If the molar heat of combustion for propane is 2200 kJ per mole, how much
energy would I get from burning 116 g of propane?
13. Write the balanced chemical equation equation for the combustion of propane
including amount of thermal E. (Molar heat of combustion is in Q # 12)
14. In an experiment similar to the lab, a propane burner consumes 1.98 grams of
fuel and is able to raise the temperature of 560 grams of water 35.7 degrees
Celcius. What is the heat of combustion and molar heat of combustion?
Hint: start by finding the amount of thermal E produced.
15. Give the type of compound, the name if you can, and draw an arrow between
any isomers.
H
|
H O H H O H H H O
| ║ | | | | | | ║
H--C--C--O--C--H H--C--C--C--H H--C--C--C--O--H
| | | | | | |
H H H H H H H
H H H H H H H H H H H
| | | | | | | | | | |
H--C--C--C--C≡≡C--C--H H--C--C--C--C--O--C--C--C--H
| | | | | | | | | | |
H H H H H H H H H H H
H H H H H H H H
| | | | | | | |
H--C--C--C--H H--C--C══C--H H--O--C--C--C--H
| | | | | | | |
H H H H H H H H
O H H H H H H
║ | | | | | |
H--O--C--C--C--C--H H--C══C--C--C--H
| | | | | |
H H H H H H
H H H H H H H H H
| | | | | | | | |
H--C--O--C--C--H H--C--C══C--C--H H--C--C--C≡≡C--C--H
| | | | | | | |
H H H H H H H H
H-C-H
|
H
CH3CH2COOCH2CH2CH3 CH3CH2COOH