DENSITY NOTES AND PRACTICE
1. What is density defined as?
2. What is density basically telling us?
3. Our baseline for density will be distilled water. What is the density of distilled water?
4. If an object sinks in water, what must its density be?
5. If an object floats on water, what must its density be?
6. What is our equation for density?
7. How would we put that equation into triangle form?
8. What are the 2 ways for determining volume:
a. .
b. .
9. What are our units for density when we determine density by measuring volume with a ruler?
10. What are our units for density when we determine density by measuring volume by displacement?
11. How do you compare the densities of cm and mL?
12. For different shapes, we have different formulas for volume. Tell me the formula for volume of a:
a. Cube:
c. Sphere:
b. Cylinder:
PROBLEMS List the known and unknown values. Then draw your triangle and show your work. INCLUDE
UNITS!
1. Osmium is a very dense metal. What is its density in g/cm3 if 50.00 g of the metal occupies a volume of
2.22cm3?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________
2. If blood has a density of 1.05 g/mL, how many milliliters of blood are donated if 575 g of blood are
given?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________
3. What is the density (g/cm3) of 48 g of a metal if the metal raises the level of water in a graduated
cylinder from 25 mL to 33 mL?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________
4. Different kinds of wood have different densities. The density of oak wood is generally 0.7 g/ cm3.
If a 35 cm3 piece of wood has a mass of 25 g, is the wood likely to be oak?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________
5. Diamonds have a density of 3.5 g/cm3. How big is a diamond that has a mass of 0.10 g?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________
6. What mass of water in grams will fill a tank 100 cm long, 50 cm wide, and 30 cm high?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________
7. A graduated cylinder is filled with water to a level of 40.0 mL. When a piece of copper is lowered into
the cylinder, the water level rises to 63.4 mL. Find the volume of the copper sample. If the density of the
copper is 8.9 g/ cm3, what is its mass?
TRIANGLE
ANSWER
Known: _____________
Known: _____________
Unknown:____________