# Unit Conversions Problem Set (Answers)

This problem set was developed by S.E. Van Bramer for Chemistry 145 at Widener University.

Solve the following problems using a calculator and then check your solution with the computer by using Convert-it. You can find detailed tables of conversion factors in the CRC Handbook of Chemistry and Physics and on the World Wide Web.

1. How many miles is a 10 kilometer running race?

6.21 mile

2. How many kilometers is a marathon (26.2 miles)?

42.2 km

3. The temperature of Liquid Helium is 4 K, express this in degrees Celsius and degrees Fahrenheit.

-269.15 °C
-452.47 °F

4. The temperature of Liquid Nitrogen is 100 K, express this in degrees Celsius and degrees Fahrenheit

-173.15 °C
-279.67 °F

5. The temperature of dry ice is -56.5° Celcius, express this in kelvins and degrees Fahrenheit

216.65 K
-69.7 °F

6. Human body temperature is 98.6° Fahrenheit, express this in degrees Celsius and kelvins

37 °C
310.15 K

7. The Exxon Valdez spilled about 1 billion gallons of oil, how many liters is this?

3.8 x 109 l

8. The volume of a milk carton is 1/2 gallon. How many liters and milliliters is this?

1.89 L
1892 mL

9. The volume of the milk used for school lunch is 1/2 pint. How many liters and milliliters is this?

0.236 L
236 mL

10. The distance to the moon is 238,855 miles. How many meters is this?

3.84401 x 108 m

11. The distance from your nose to your fingertips with your arm stretched out is about 1 yard. How many meters is this? How many cm? How many mm?

0.9144 m
91.44 cm
914.4 mm

Please send comments or suggestions to svanbram@science.widener.edu

Scott Van Bramer
Department of Chemistry
Widener University
Chester, PA 19013