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Density

Density. Prefix Conversions. khdbdcm. Assume your mass is 55 kg. How many grams do you weigh?. 1) 80 cm = ______________ m 2) 25 L = ______________ mL 3) 4500 g = ______________ Kg 4) 805 m = ______________ km. A. SI Prefix Conversions. khdbdcm. 0.8. 25,000. 4.5. 0.805.

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Density

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  1. Density

  2. Prefix Conversions khdbdcm Assume your mass is 55 kg. How many grams do you weigh?

  3. 1) 80 cm = ______________ m 2) 25 L = ______________ mL 3) 4500 g = ______________ Kg 4) 805 m = ______________ km A. SI Prefix Conversions khdbdcm 0.8 25,000 4.5 0.805

  4. B. Dimensional Analysis • Steps: 1. Identify starting & ending units. 2. Setup conversion correctly. 3. Multiply all top numbers, then divide by all the bottom numbers multiplied together 4. Check units & answer.

  5. B. Dimensional Analysis • Lining up conversion factors: = 1 1 L = 1000 ml 1000 ml 1 L

  6. L mL B. Dimensional Analysis • How many milliliters are in 15 liters of Mt. Dew? 1000 mL 1 L 15 L = 15,000 mL

  7. mm cm  B. Dimensional Analysis • Your European hairdresser wants to cut your hair 8 cm shorter. How many mm will he be cutting off? 8 cm 10 mm 1 cm = 80 mm

  8. km mm B. Dimensional Analysis 6) How many millimeters long is a 5K (5 km) race? 1000 m 1 km 1000mm 1 m 5 km = 5,000,000 mm

  9. Measuring Volume • Volume - amount of space occupied by an object • Volume of a solid rectangle (V = l x w x h) • 1 mL = 1 cm3 • 1000 mL = _____L • 1 L = _______ cm3

  10. Measuring Volume • Odd shape solid • Method: • water displacement • Initial Volume ____ • Final Volume ____ • Object’s Volume ____

  11. M V M D= D V Density • Density - mass per unit volume (g/cm3) - (g/mL)

  12. D = g/cm3 or g/mL M = g V = cm3 or mL

  13. WORK: D = M V D = 620 g 753 cm3 M D V D. Density 2) You have a sample with a mass of 620 g & a volume of 753 cm3. Find density. GIVEN: M = 620 g V = 753 cm3 D = ? D = 0.82 g/cm3

  14. M D V D. Density • An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its mass. GIVEN: V = 825 cm3 D = 13.6 g/cm3 M = ? WORK: M = DV M = (13.6 g/cm3)(825cm3) M = 11,220 g

  15. WORK: V = M D V = 25 g 0.87 g/mL M D V D. Density 1) A liquid has a density of 0.87 g/mL. What volume is occupied by 25 g of the liquid? GIVEN: D = 0.87 g/mL V = ? M = 25 g V = 28.7 mL

  16. Float v. Sink

  17. Mass (g) Volume (cm3) B. Graphing & Density Slope = ∆Y ∆X

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