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Honors Chemistry Unit I - Power Point 10

Learn about density, a key property of matter that distinguishes materials. Discover how to calculate density, units, and examples. Practice calculating density in different blocks. Unveil the importance of density in identifying materials.

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Honors Chemistry Unit I - Power Point 10

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  1. Honors Chemistry Unit I - Power Point 10 Density

  2. Density • Take a look at the two boxes below. Each box has the same volume. If each ball has the same mass, which box would weigh more? Why?

  3. Density • The box that has more balls has more mass per unit of volume. • This property of matter is called density. The density of a material helps to distinguish it from other materials. • Density d = mass/volume (g/ml) • I love density m v Mass volume

  4. Density = Mass of substance per unit volume of the substance. • Common units are g/cm3 or g/mL.

  5. Example #1 • A certain mineral has a mass of 17.8 g and a volume of 2.35 cm3. What is the density of this mineral?

  6. Example #2 • What is the mass of a 49.6-mL sample of a liquid, which has a density of 0.85 g/mL?

  7. Density More practice - Calculate the density of each block. Block I Block II Mass = 79.43 grams Mass = 25.41 grams Volume=29.8 ml Volume = 29.8 ml

  8. Density • Block I • Density = 79.43 grams / 29.8 ml = 2.67 g/ml • Block II • Density = 25.41 grams / 29.8 ml = 0.85 g/ml

  9. Density • Density is a physical characteristic of a material and allows us to determine what each block is made of. • All pieces of matter made of the same material will have the same density. • Different matter will have different densities.

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