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DENSITY

DENSITY. There are three states of matter:. solid. liquid. gas. Gas. Solids. Liquids. Density – the amount of matter that occupies space. Molecules close together. Molecules spread out further. Molecules spread far apart.

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DENSITY

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  1. DENSITY

  2. There are three states of matter: solid liquid gas

  3. Gas Solids Liquids Density – the amount of matter that occupies space Molecules close together Molecules spread out further Molecules spread far apart

  4. To determine density, you must divide the mass by the volume. D = m÷v

  5. Mass is measured in grams using a triple beam balance…

  6. or a digital scale.

  7. We can determine the mass of the box using the digital scale. 750 g

  8. Volume of a regularly-shaped object can be measured using a ruler.

  9. If the object has smooth sides where a ruler can be used to measure the length, width, and height, it is considered regular-shaped.

  10. Volume = length x width x height 2 cm 5 cm 15 cm

  11. V = l x w x h V = 15 cm X 5 cm X 2 cm V = 150 cm3

  12. Determine the volume of the cube. 3 cm

  13. V = l x w x h V = 3 cm X 3 cm X 3 cm V = 27 cm3

  14. Volume of a liquid is measured in mL using a graduated cylinder or a beaker.

  15. Objects that do not have smooth sides to measure are called irregular-shaped. To measure the volume of these objects we use waterdisplacement.

  16. 50 40 30 20 10 Water is put into a graduated cylinder and the volume of the water is measured.

  17. The object is placed in the graduated cylinder. 50 40 30 The volume of the water and the object is determined. 20 10

  18. The first volume is subtracted from the second volume. 40 mL – 29 mL = 11 mL The volume of the object is 11mL.

  19. Density does not depend on the amount of the substance. The density of the block is 16 g/cm3

  20. If it is cut in half, what happens to the density? Density of block is 16 g/cm3 Density of block is 16 g/cm3

  21. Sulfur Hexafluoride & Density

  22. Sulfur Hexafluoride & Density

  23. The density of water is 1g/mL.

  24. If an object with a density of less than 1g/mL is placed in the water, it will float.

  25. If an object with a density of greater than 1g/mL is placed in the water, it will sink.

  26. Alcohol Oil Water Density = 1g/mL DENSITY COLUMN Can you give an estimation of the density of the alcohol and the oil?

  27. Alcohol Oil Water Density = 1g/mL DENSITY COLUMN The density of the oil is less than 1 g/mL. The density of the alcohol is less than the density of the oil.

  28. DENSITY COLUMN Estimate the density of the piece of wood. Alcohol Density = .75 g/mL Oil Density = .96 g/mL The density of wood is .8 g/cm3. Water Density = 1g/mL

  29. DENSITY COLUMN Estimate the density of the piece of ice. Alcohol Density = .75 g/mL Oil Density = .96 g/mL The density of ice is .9 g/cm3. Water Density = 1g/mL

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