determining density
DESCRIPTION
3.4. Determining Density. Determining Density What determines the density of a substance?. 3.4. Determining Density. Density is the ratio of the mass of an object to its volume. 3.4. Determining Density. Each of these 10-g samples has a different volume because the densities vary. 3.4. - PowerPoint PPT PresentationTRANSCRIPT
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Determining Density
Determining Density
What determines the density of a substance?
3.4
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Determining Density
Density is the ratio of the mass of an object to its volume.
3.4
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Determining Density
Each of these 10-g samples has a different volume because the densities vary.
3.4
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Determining Density
Density is an intensive property that depends only on the composition of a substance, not on the size of the sample.
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Determining Density
The density of corn oil is less than the density of corn syrup. For that reason, the oil floats on top of the syrup.
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Density and Temperature
Density and Temperature
How does a change in temperature affect density?
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Density and Temperature
Experiments show that the volume of most substances increases as the temperature increases. Meanwhile, the mass remains the same. Thus, the density must change.
The density of a substance generally decreases as its temperature increases.
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3.10
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for Sample Problem 3.10
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3.11
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for Sample Problem 3.11
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3.4 Section Quiz
1. If 50.0 mL of corn syrup have a mass of 68.7 g, the density of the corn syrup is
a. 0.737 g/mL.
b. 0.727 g/mL.
c. 1.36 g/mL.
d. 1.37 g/mL.
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3.4 Section Quiz
2. What is the volume of a pure gold coin that has a mass of 38.6 g? The density of gold is 19.3 g/cm3.
a. 0.500 cm3
b. 2.00 cm3
c. 38.6 cm3
d. 745 cm3
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3.4 Section Quiz
3. As the temperature increases, the density of most substances
a. increases.
b. decreases.
c. remains the same.
d. increases at first and then decreases.
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