Density
Name ___________________
Mark each Statement TRUE or FALSE. CORRECT THE FALSE STATEMENTS.
______ 1. If two objects have the same volume, the one with the larger mass is more dense.
______ 2. Salt water is less dense than tap water.
______ 3. If a solid object is less dense than the liquid it is in, it will sink to the bottom.
______ 4. If you change the shape of a substance, like a piece of clay, its density changes.
______ 5. Water is more dense than oil therefore water floats on top of oil.
Multiple Choice. Write the letter of the best choice on the line in front of the number.
_____ 6. Which of these statements is correct about the
5 liquids shown in the graduated cylinder to the right?
a. the middle liquids are more dense than the liquids below them
b. the top liquid is less dense than the liquid below it
c. the liquid on the bottom is the least dense liquid
d. the liquid on top is the most dense liquid
______ 7. What is the volume of a wood block that
has a mass of 325 g. The density of the wood
is 0.85 g/ cm3. Answer must be in the correct
number of significant digits.
a. 382.35 cm3
c. 382 cm3
b. 380 cm3
d. none of these
______ 8. What is the mass of 250.0 mL of Mercury in the correct number of significant digits?
The density of Mercury is 13.5 g/mL.
a. 3380 g
b. 3375 g
c. 18.5 g
d. 0.052 g
______ 9. Which of these statements is correct about the billiard ball
shown floating on the right?
a. the density of the billiard ball exactly equals the density
of the liquid
b. the billiard ball is much less dense than the liquid
c. the billiard ball is much more dense than the liquid
d. too much information is provided to answer this question
______ 10. Jane has two solid cubes made of the same material. One cube is very large, and
the other cube is very small. Which of these statements is correct?
a. The density of the larger cube is less than the smaller cube
b. The larger cube is more likely to float in water than the smaller cube
c. The density of the larger cube is greater than the smaller cube
d. The larger cube has more mass than the smaller cube
e. the smaller cube has more mass than the larger cube
______ 11. Objects 1 and 2 float as shown in the beaker below.
The density of the liquid in the beaker is 3.2 g/cc.
Which of the densities given below are possible values
for the densities of the two objects?
a. Density of object 1 = 4.4 g/cc
b. Density of object 1 = 3.0 g/cc
c. Density of object 1 = 1.6 g/cc
d. Density of object 1 = 2.5 g/cc
Density of object 2 = 4.0 g/cc
Density of object 2 = 1.8 g/cc
Density of object 2 = 2.9 g/cc
Density of object 2 = 3.8 g/cc
_____ 12. A block of aluminum alloy with a volume of 12 cm3 has a density of 3 g/cm3. The
block is cut into two pieces. One piece has a volume of 8 cm3, and the other piece
has a volume of 4 cm3. What are the densities of the two pieces?
a. The larger piece has a density of 2 g/cm3 and the smaller piece has a density of 1 g/cm3
b. The smaller piece has a density of 2 g/cm3 and the larger piece has a density of 1 g/cm3.
c. The two blocks both have densities of 1.5 g/cm3.
d. The two blocks both have densities of 3 g/cm3.
Use the 3-step method to solve 13 - 16 problems: (Show all 3 steps)
Step 1. Write the equation using the symbols, D, m and V
Step 2. Fill in the numbers and units for the values that you
are given in the problem.
Step 3. Solve the problem mathematically and write the
answer with the proper units in the correct number
of significant digits.
13) What is the mass of a solid silver cuff bracelet with a volume
of 398 mL? The density of silver is 10.5 g/cm3.
mass= density × volume
Volume =
mass
density
Density =
mass
volume
14) There is a copper ball with a mass of 3640 g. The density of copper is 8.96 g/cm3.
What is its volume?
15) A rectangular block of copper metal has a mass of 1896 g. The dimensions of the block are
8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper?
16) 28.5 g of iron is added to a graduated cylinder containing 45.50 mL of water. The water level
rises to the 49.10 mL mark, from this information, calculate the density of iron.
Short Answer Questions
Air
Wood
Corn Oil
Water
Plastic disc
Glycerol
Corn
Syrup
Rubber ball
Steel Alloy
Density of Air = 0.001 g/cm3
Density of Water = 1.00 g/ mL
Density of Corn Syrup = 1.38 g/mL
Density of Corn Oil = 0.925 g/ mL
Density of Glycerol = 1.26 g/ mL
17. Using the densities provided for each liquid on the previous page, predict the density of
each solid object. For example you might predict the density of an object to be more than
1.26 g/ cm3 or you might predict an object to have a density greater than 1.00 g/cm3 but less
than 0.95 g/cm3.
Wood
__________________
Plastic disc
_______________________
Rubber Ball
___________________
Steel alloy
_______________________
18. Using the table of glass densities provided below, could you identify a sample of
porcelain glass from window glass or headlight glass based on density alone? Why
or why not?
Material
Pyrex
Density
g/cm
2.23 g/cm
3
Porcelain
3
2.3 - 2.5
g/cm
3
Window
Glass
2.47 - 2.56
g/cm
3
Headlight
Glass
2.47 – 2.63
g/cm
3
Flint Glass
2.9 – 5.9
g/cm
3