CHEM HW FOR Nancy Carol

Chemistry 121 - Chemistry in the Modern World

Weekly Worksheet 1

Directions: Answer the following questions using your textbook. Create a separate Word document listing the correct answers (short answer or multiple choice) and submit it in the Assignments folder. Use as a title your name and the week number. For example, I would call this assignment Matton1. Each question is worth 1or 2 points for a total of 40 points.

1. Chapter 1, Question 8a (2points, be sure to explain)

2. Chapter 1, Question 8b (2points, be sure to explain)

3. Chapter 1, Question 8c (2points, be sure to explain)

4. Chapter 1, Question 9a (1 point)

5. Chapter 1, Question 9b (1 point)

6. Chapter 1, Question 9c (1 point)

7. Chapter 1, Question 9d (1 point)

8. Chapter 1, Question 10c (1 point)

9. Chapter 1, Question 10d (1 point)

10. Chapter 1, Question 15a (1 point)

11. Chapter 1, Question 15b (1 point)

12. Chapter 1, Question 15c (1 point)

13. Chapter 1, Question 15d (1 point)

14. Chapter 1, Question 15e (1 point)

15. Chapter 1, Question 15f (1 point)

16. Chapter 1, Question 17a (1 point)

17. Chapter 1, Question 17b (1 point)

18. Chapter 1, Question 20a (1 point)

19. Chapter 1, Question 20b (2 points)

20. Chapter 1, Question 20c (4 points)

21. Chapter 1, Question 21a (1 point)

22. Chapter 1, Question 21b (1 point)

23. Chapter 1, Question 21c (1 point)

1. Which of the following is NOT an element?

a. copper

b. carbon

c. lead

d. steel

2. This air pollutant is a complex mixture of fine particles, soot, smoke and ash. The smaller forms of these enter the lungs and are particularly dangerous.

a. CO

b. Ozone

c. SO2

d. NO2

e. Particulate matter, PM

3. This air pollutant is originates primarily from the burning of coal. It has a sharp odor and dissolves in the lungs to form an acid.

f. CO

g. Ozone

h. SO2

i. NO2

j. Particulate matter, PM

4. Refined white table sugar is usually derived from either sugar cane or sugar beets. Irrespective of the source of table sugar, after refining it always has the same composition of carbon, hydrogen and oxygen. Sugar is best classified as which one of the following?

a. Element

b. Compound

c. Mixture

d. State

5. This air pollutant is emitted from motor vehicles, has no color taste or smell and can cause death.

k. CO

l. Ozone

m. SO2

n. NO2

o. Particulate matter, PM

6. The amount of aluminum on the earth today relative to the amount 100 years ago when Al was first commercially extracted from bauxite, an aluminum containing ore, (think!)

a. is essentially the same.

b. is decreasing rapidly due to production of aluminum beverage containers.

c. is decreasing, but more slowly recently due to interest in recycling.

d. is actually increasing due to recycling efforts and more energy efficient production methods.

7. The most common molecule found in the atmosphere is,

a. oxygen.

b. carbon dioxide.

c. argon.

d. nitrogen.

e. water vapor.

8. Volatile organic compounds, VOCs,

a. contain carbon.

b. easily pass into the gaseous phase at room temperature.

c. participate in reactions that lead to the formation of ozone and NO2.

d. are removed from vehicle emissions by the action of a catalytic converter.

e. All of the above statements are true.

9. Which of the following statements is false?

a. Ozone in the air we breathe is not harmful.

b. We need ozone in the stratosphere to shield us from harmful UV rays

c. Ozone is produced in a reaction between oxygen molecules and an oxygen atom.

d. Ozone formation requires sunlight.

10. Chemistry is your favorite subject because,

a. it is easy.

b. the instructor is fantastic.

c. you love on-line learning.

d. question 11 on problem set 1 is a freebie.