Name: ____________________________________ Date: ________________________ P___R___S___
CPA Chemistry
Density Worksheet 1
Teacher’s Demo:
1. Compare a cork and a rubber stopper. Do they have the same volume? _____________
2. Measure their masses: cork: _______ rubber stopper: ______ Are they the same? _____
3. Now put both pieces into a beaker of water.
The cork (sinks in / floats on) the water, and the rubber stopper (sink in / floats on) the water.
4. Assume that they both have the same volume of 2.0 cm3:
What is the value of mass for the cork? _________________ for rubber stopper? ________________
volume
5. Which one has bigger value of mass / volume? _____________
6. Mass / volume = _______________
7. Different substances with the same volume but bigger masses have bigger __________.
Thus, the cork has a (smaller / bigger) density, & the rubber stopper has a (smaller / bigger) density.
8. Combine (3) and (7):
the cork that has (smaller / bigger) density will (sink in / float on) the water;
the rubber stopper that has (smaller / bigger) density will (sink in / float on) the water.
So, what is a density? ____________________________________________________________________
Is density a physical property or chemical property? __________________
How do you know? _____________________________________________________________________
Objects with the same volume but different masses have (same / different) densities.
What determines the density of a substance? __________________________________________________
The density of water = 1 g / mL
What do you think the density of the cork comparing to the density of water? _______________________
What do you think the density of the rubber stopper comparing to the density of water? _______________
Conclusion:
1. The formula of Density = _________________ or D = ___________________
2. The substance with the density bigger than 1 g/mL will (sink in / float on) the water.
3. The substance with the density smaller than 1 g/mL will (sink in / float on) the water.
 The substance with the bigger density will (sink in / float on) the substance with the smaller density.
 The substance with the smaller density will (sink in / float on) the substance with the smaller density.
UNIT OF MASS = g
Density =
mass
volume
Practice Problems:
UNIT OF VOLUME
solids (cm3)
liquids (mL)
UNITS OF DENSITY
solids (g/cm3)
liquids (g/mL)
1 point = information given with symbols & units
1 point = equation set up
1 point = answer from calculator
1 point = rounding answer (2 decimal places)
1 point = correct unit
Total points = 5 points
1. mass = 4.5 g, volume = 3.2 cm3, density = ?
2. mass = 9.29 g, volume = 49.8 mL, density=?
Is it a solid or a liquid? ____________
Is it a solid or a liquid? ______________
How do you know? ______________________
How do you know? ______________________
3. volume = 5.2 cm3, mass = 2.5 g, density = ?
4. volume = 2.91 mL, mass = 9.51 g, density = ?
Solid / liquid
5. mass = 9.8 g, volume = 2.98 cm3, density = ?
Solid / liquid
6. mass = 3.98 g, volume = 16.9 mL, density = ?
Solid / liquid
7. mass = 66.3 g, volume 0.21 mL, density = ?
Solid / liquid
8. mass = 908 g, volume 22.6 cm3, density = ?
Solid / liquid
9. volume = 879.01 cm3, mass = 32.8 g, density = ?
Solid / liquid
10. volume = 234.9 mL, mass = 21.9 g, density = ?
Solid / liquid
11. volume = 2.91 mL, mass = 9.51 g, density = ?
Solid / liquid
12. volume = 23.9 cm3, mass = 12.9 g, density = ?
Solid / liquid
Solid / liquid
WORD PROBLEMS
1. A block of cube occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?
2. Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill
the cylinder weighs 306.0 g. From this information, calculate the density of mercury.
3. A block of lead has the volume of 231.09 cm3. The block weighs 1587 g. From this information, calculate
the density of lead.
4. 28.5 g of iron shot 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.