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PRACTICE HOMEWORK 14 – CONVERSION FACTORS 3
MULTI-STEP CONVERSION CALCULATIONS
General Information
 This Practice Homework Assignment should be completed by Wednesday (2/10).
 Do all of the Practice Homework assignments and bring them to class. Keep this in your class notebook.
 Remember that I can ask for any of the Practice Homework assignments at any time to grade.
 I have included the answers (but not the solutions), so that you can tell whether you are doing the questions
correctly.
Reading
 Class Notes: Notes-013
 Chapter 2.3 and Chapter 2.4. There are examples that will help, if the lecture was a bit confusing.
 You may conversion factors only from Appendices 1, 2, 3, and 4. You may not use google-searched conversion
factors.
Questions

You must use dimensional-analysis format for these calculations. Do not use proportions.

You may do these in one long calculation, or you may break the calculations into smaller pieces. Your choice.

Remember that some of these conversion factors must be memorized by the first quiz, and definitely by the first
exam.
Example)
How many yards are in 8.20 decimeters?
(
8.20 dm
1m
1 yd
) (
) (
) =
1
10 dm
1.0936 m
0.750 yd
OR
(
(
*
*
*
8.20 dm
1m
) (
) =
1
10 dm
0.820 m
1 yd
) (
) =
1
1.0936 m
0.820 m
0.750 yd
10 dm = 1 m was obtained from Appendix 2
1.0936 m = 1 yd was obtained from Appendix 4
You do not need to state the specific appendices. I listed them here to let you know that you must use conversion
factors from the given appendices only.
Page 1 of 6
CHEM 110 (BEAMER)
1)
Convert 44.25 ounces (weight) kilograms.
2)
Convert 2654.7 nanometers to centimeters.
Page 2 of 6
CHEM 110 (BEAMER)
3)
Convert 0.0250 gallons to milliliters.
4)
Convert 0.00564 km to cm
Page 3 of 6
CHEM 110 (BEAMER)
5)
Convert 54.2 ounces (weight) per cubic decimeter to grams per milliliter.
6)
Convert 40.72 meters per min to miles per day
Page 4 of 6
CHEM 110 (BEAMER)
7)
Optional Challenge Question. A neutron star has a density of 5.80 × 108 kilograms per cubic meter. Determine the density of the star in units of
(English) tons per teaspoon. Given: 1 m3 = 1000 dm3. Your work must be organized. In fact, you might have to rewrite your work on a separate sheet
of paper and staple it to the back of this packet. This question is not worth any points for this assignment...not even extra credit. A question like this on
Exam 1 would be extra credit. Note: On the Exam, you would be required to convert m3 to dm3 by yourselves.
Page 5 of 6
CHEM 110 (BEAMER)
Answer Key
1)
1.254 kg
5)
1.54 g/mL
2)
2.6547 × 10–4 cm
6)
36.44 mi/day
3)
94.6 mL
7)
3.15 ton/tsp
4)
564 cm
Page 6 of 6