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Density

Density. can be used to help identify different types of matter. how many different types of matter are packed together. how much mass there is per unit of volume of a substance

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Density

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  1. Density can be used to help identify different types of matter. how many different types of matter are packed together. how much mass there is per unit of volume of a substance Imagine a cube, one cm tall, one cm wide, and one cm long. If that cube is filled with Styrofoam it is light. If it is filled with lead (Pb) it is heavy. The lead (Pb) is heavier because it has a higher density than Styrofoam.

  2. Liquid substances that are less dense will float when mixed with substances that are more dense Solid substances will float on a liquid that has more density. Example: plastic on water (water has a higher density than plastic so the plastic floats)

  3. Immiscible: Liquids that are insoluble(don’t mix together) in one another. Example: oil and water When Immiscible substances are mixed they will settle out to form a density column.

  4. Miscible: Liquids that are soluble (will mix together) Example: water and food coloring

  5. Calculating Density • Formula for density: • Density (D) = Mass (M) / Volume (V) • Example: Find the density of an object whose mass is 10g and volume is 5 mL • Answer: 2 g/mL • Formula for mass: • M = DV • Formula for volume • V = M / D

  6. You can tell if an object will sink, float, or suspend in water • The density of water is 1 g/ml • Sink – the density of the object will be more than the density of water • Float- the density of the object will be less than the density of water • Suspend- the density of the object is the same as the density of water

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