Name__________________________________
GT Chem – Density & Measurement
Period___
1. Convert 22.3 mL to (a) liters
(b) cubic inches
2. 1 cup = 225 mL. What is the density of clover honey (in g/mL) if three quarters
of a cup has a mass of 252 g? (no SF this problem)
3. A metal slug weighing 25.17g is placed into a flask which can hold a total
volume of 59.7mL. Then 43.7 g of methanol (d = 0.791 g/mL) is added to
completely fill the flask. What is the density of the metal?
4. A water bed filled with water has the dimensions 8.0ft x 7.0ft x 0.75ft. Taking the
density of water to be 1.00g/mL, how many kilograms of water are needed to fill
the water bed?
5. Wire is often sold in pound spools according to the wire gauge number. That
number refers to the diameter of the wire. How many meters are in a 10.0 lb
spool of 12 gauge aluminum wire that has a diameter of 0.0808in? Aluminum has
a density of 2.70g/mL. ( V = π r2 l )
6. Air is 21% oxygen by volume. Pure oxygen has a density of 1.31 g/L. What is
the volume, in L, of a room that holds enough air to contain 55kg of oxygen?
7. A cup of brewed coffee is made with about 9.0g of ground coffee beans. If a
student brews 3 cups each day, how much will the student spend on a year’s
supply of gourmet coffee that sells at a price of $8.99/lb?
8. Classify each of the following as physical or chemical properties of water.
a. It is a colorless liquid at 298K and 1 atm.
b. When combined with sodium it forms sodium hydroxide and hydrogen
gas.
c. Its melting point is 273K.
d. It is insoluble in carbon tetrachloride.
9. A pycnometer is a device used to measure density. It has a mass of 20.455g when
empty and 31.486g when filled with water. Pieces of alloy are put into a dry,
empty pycnometer. The mass is then determined to be 28.695g. Water is then
added to completely fill the device. The mass of the pycnometer, alloy and water
is 38.689g, what is the density of the alloy?
10. Why is the density of a regular soda greater than the density of a diet soda?
SOLUTIONS:
1.
2.
3.
4.
5.
6.
7.
8.
0.0223 L
1.36 cubic inches
D = 1.49 g/mL
D = 5.7 g/mL
m = 1.2 x 103 kg
5.10 x 102 m
2.0 x 105 L
$2.0 x 102
a. Physical
b. Chemical
c. Physical
d. Physical
9. D = 7.946 g/mL
10. Regular sodas contain sweeteners such as
cane sugar or high fructose corn syrup. Diet
sodas contain sweeteners such as Aspartame
or Splenda. The mass of artificial sweetener
needed is much less than that of sweeteners
such as sugar/high fructose corn syrup.