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Determining Density

Determining Density

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Determining Density

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  1. 3.4 Determining Density • Determining Density • What determines the density of a substance?

  2. 3.4 Determining Density • Density is the ratio of the mass of an object to its volume.

  3. 3.4 Determining Density • Each of these 10-g samples has a different volume because the densities vary.

  4. 3.4 Determining Density • Density is an intensive property that depends only on the composition of a substance, not on the size of the sample.

  5. 3.4 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.

  6. 3.4 Density and Temperature • Density and Temperature • How does a change in temperature affect density?

  7. 3.4 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.

  8. 3.10

  9. 3.10

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  11. for Sample Problem 3.10

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  15. for Sample Problem 3.11

  16. 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 • 0.737 g/mL. • 0.727 g/mL. • 1.36 g/mL. • 1.37 g/mL.

  17. 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. • 0.500 cm3 • 2.00 cm3 • 38.6 cm3 • 745 cm3

  18. 3.4 Section Quiz • 3. As the temperature increases, the density of most substances • increases. • decreases. • remains the same. • increases at first and then decreases.

  19. END OF SHOW