Chemistry
Name_________________
Chapter 3 Worksheet 3
1. Fill in the blanks of each conversion factor. Write the correct answer next to the equal sign.
a) Convert 100 grams to kg.
b) Convert 10.0 mL to L.
æ
100 grams ç
è
æ
10.0 mL ç
è
kg ö
÷=
gram ø _____________
Lö
÷=
mL ø ___________
c) Convert 100 kg to grams.
d) Convert 10.0 L to mL.
æ
100 kg ç
è
æ
10.0 L ç
è
gö
÷=
kg ø ____________
mL ö
÷=
L ø ___________
e) Convert 2 tons to kg. (1 ton = 2000 lbs, 454 g = 1 lb)
æ
2 tons ç
è
lb öæ
֍
ton øè
g öæ
֍
lb ø è
f) Convert 5’7” to cm. (2.54 cm = 1”)
æ
______ inches ç
è
cm ö
÷=
ø ________
kg ö
÷=
g ø _____________
g) Convert 2.79 g/mL to lbs/cm3.
æ
2.79 g mL ç
è
lb ö æ
֍
g øè
mL ö
÷=
cm3 ø
2. Answer the following. Box in your final answer with the appropriate units.
a) A piece of land measures 110 ft by 55 ft. Calculate the area of the land in sq. yd.
b) Convert 0.0034 mol Fe3O2 into grams; 1 mol Fe3O2 = 85.9951 grams
c) Convert 55 mi/hr to meters per second. (1.6 km = 1 mile)
3. Medicines were at one time dispensed in the apothecaries’ measuring system. Several apothecaries’
units are listed below.
1 pound = 12 ounces,
1 ounce = 8 drams,
1 dram = 3 scruples,
1 scruple = 20 grains
a) How many scruples are in 1.0 ounce?
b) How many drams are in 1.0 scruple?
c) How many scruples are in 4.5 ounces?
d) How many pounds are in 134 drams?
*e) If 175 apothecaries’ pounds = 144 English pounds, how many grams are in 1.0 scruple?
(2.205 English pounds = 1 kg)
4. Gems are measured in a unit called a carat. One carat equals 200. milligrams. If a diamond ring is 0.60
carat, what is the mass of the diamond in ounces? (16 ounces = 1 pound)
5. Use the conversions below to answer the questions.
1 meter = 3.281 feet,
3 feet = 1 yard,
1 fathom = 2 yards,
1 chain = 11 fathoms,
1 nautical mile = 6080 feet,
1 rod = 16.5 feet,
1 league = 3 nautical miles
a) How far is twenty thousand leagues in kilometers?
b) Which unit is larger and by how many times; the rod or the chain?
c) How tall is a 6’2” person in fathoms? Can you fathom this question?
d) Convert 6 chains into inches.
6. The density of water is 1.00 g/mL. How much would 10 gallons of water weigh in pounds? Express your
answer with the correct number of significant digits. (1 kg = 2.205 lb, 1 gallon = 3.785 L)