Name
Date
Pd
Unit 1 Worksheet 4 – Applied density problems
2c
2c
1. Determine the density of each metal. Show all your work and include appropriate units.
A:
100  0 g
11.1g / mL
9  0 mL
2. From the graph, estimate
a. the mass of 8.0 cm3 of metal A.
b. the volume of 70 g of metal B.
B:
78  0 g
 7.8 g / mL
10  0 mL
90 g
9 mL
xmL 1mL

x  8.9mL
70 g 7.8 g
c. mark on the graph how you found the answers above
3. In the space above right, use the density of B as a factor to determine
the answer to 2b. Show the set-up including how the units cancel.
Modeling Chemistry
U1 ws 4 v1.5
4. Ethanol has a density of 0.789 g/cm3.
a. What is the mass of 225 cm3 of ethanol?
xg
0.789 g

x  178 g
225mL
1mL
b. What is the volume of 75.0 g of ethanol?
1mL
xmL

x  95.1mL
75.0 g 0.789 g
5. What is the density of water in g/mL? Why?
1.0 g/mL; 1 gram of water has a volume of 1 mL or 1mL has a mass of 1 g.
6. The cup is a volume widely used by cooks in the U.S. One cup is equivalent to 237 cm3. If 1
cup of olive oil has a mass of 216 g, what is the density of olive oil in g/cm3?
216g
 0.911g /cm 3
237cm 3

7. What would you expect to happen if the cup of olive oil in question 6 is poured into a container
of ethanol? Why?
Olive oil is more dense than ethanol so it will sink to the bottom of the container.
Gold has a density of 19.3 g/ cm3. A cube of gold measures 4.23 cm on each edge:
8. What is the volume of the cube?
4.23cm x 4.23cm x 4.23cm  75.7 cm 3
9. What is its mass? How many significant figures should you include in your answer and why?
There are 3 significant figures in the least precise
19.3 g
xg

x  1460 g
3
3
measurement.
75.7 cm
1cm
10. A standard backpack is approximately 30cm x 30cm x 40cm. Suppose you find a hoard of pure
gold while treasure hunting in the wilderness. How much mass would your backpack hold if you
filled it with the gold? An average student has a mass of 70 kg. How do these values compare?
Volume  30cm x 30cm x 40cm  36,000 cm3
19.3 g
1 kg
xg

x  694,800 g x
 694.8 kg, 700 kg (one sig . fig.)
3
1mL
1000 g
36,000 cm
The backpack of gold has ten times the mass of an average student.
Modeling Chemistry
U1 ws 4 v1.5
Modeling Chemistry
U1 ws 4 v1.5