Chapter 1 Chemical Foundations 1.8 Density
Chapter 1 Chemical Foundations 1.8
Density
Copyright ? 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings
1
Density
Density
? Compares the mass of an object to its volume. ? Is the mass of a substance divided by its
volume.
Density expression Density = mass = g or g = g/cm3
volume mL cm3 Note: 1 mL = 1 cm3
2
Densities of Common Substances
3
Learning Check
Osmium is a very dense metal. What is its density in g/cm3 if 50.0 g of osmium has a volume of 2.22 cm3?
1) 2.25 g/cm3 2) 22.5 g/cm3 3) 111 g/cm3
4
Solution
Given: mass = 50.0 g volume = 22.2 cm3 Plan: Place the mass and volume of the osmium metal
in the density expression.
D = mass volume
calculator final answer (2)
= 50.0 g 2.22 cm3
= 22.522522 g/cm3 = 22.5 g/cm3
5
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