Transcription of Chapter 1 Chemical Foundations 1.8 Density
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Chapter 1 Chemical Foundations 1.8 Density
Chapter 1 Chemical Foundations 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 g of osmium has a volume of cm3? 1) g/cm3. 2) g/cm3. 3) 111 g/cm3. 4. Solution Given: mass = g volume = cm3. Plan: Place the mass and volume of the osmium metal in the Density expression. D = mass = g volume cm3. calculator = g/cm3. final answer (2) = g/cm3.
Density can be written as an equality. • For a substance with a density of 3.8 g/mL, the equality is 3.8 g = 1 mL • From this equality, two conversion factors can be written for density. Conversion 3.8 g and 1 mL factors 1 mL 3.8 g Density as a Conversion Factor
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