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A Day With Density

A Day With Density. Physical Science Standard. PS-3.1 Distinguish chemical properties of matter (including reactivity) from physical properties of matter (including boiling point, freezing/ melting point, density [with density calculations] , solubility, viscosity, and conductivity). Density.

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A Day With Density

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  1. A Day With Density

  2. Physical Science Standard PS-3.1 Distinguish chemical properties of matter (including reactivity) from physical properties of matter (including boiling point, freezing/ melting point, density [with density calculations], solubility, viscosity, and conductivity).

  3. Density • Every object has a certain density • Density can be used to identify objects

  4. Density Density compares the mass of an object to its volume D = mass = g or g volume mL cm3 Note: Remember 1 mL = 1 cm3

  5. Learning Check Osmium is a very dense metal. What is its density in g/cm3 if 50.00 g of the metal occupies a volume of 2.22cm3? a) 2.25 g/cm3 b) 22.5 g/cm3 c) 111 g/cm3

  6. Solution 2) Placing the mass and volume of the osmium metal into the density setup, we obtain D = mass = 50.00 g volume 2.22 cm3 = 22.522522 g/cm3 = 22.5 g/cm3

  7. Learning Check If blood has a density of 1.05 g/mL, how many milliliters of blood are donated if 575 g of blood are given? a) 548 mL b) 1250 mL c) 1830 mL

  8. Solution • Solve for volume: v = m = 575g d 1.05g/ml v = 548ml

  9. Volume Displacement A solid displaces a matching volume of water when the solid is placed in water. 33 mL 25 mL

  10. Learning Check What is the density (g/cm3) of 48 g of a metal if the metal raises the level of water in a graduated cylinder from 25 mL to 33 mL? a) 0.2 g/ cm3 b) 6 g/cm3 c) 252 g/cm3 25 mL 33 mL

  11. Solution b) 6 g/cm3 Volume (mL) of water displaced = 33 mL - 25 mL = 8 mL Volume of metal (cm3) 8 mL = 8 cm3 Density of metal = mass/ volume 48g = 6g = 6 g/cm3 8cm3 cm3

  12. Learning Check3 Which diagram represents the liquid layers in the cylinder? (K) Karo syrup (1.4 g/mL), (V) vegetable oil (0.91 g/mL,) (W) water (1.0 g/mL) 1) 2) 3) W K V V K W W K V

  13. Solution (K) Karo syrup (1.4 g/mL), (V) vegetable oil (0.91 g/mL,) (W) water (1.0 g/mL) 1) V W K

  14. Learning Check You have 3 metal samples. Which one will displace the greatest volume of water? 1 2 3 Discuss your choice with another student. 25 g Al 2.70 g/cm3 45 g of gold 19.3 g/cm3 75 g of Lead 11.3 g/cm3

  15. Solution 1) v = m = 25g = 9.2cm3 d2.70g/cm3 25 g Al 2.70 g/cm3

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