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CP Chemistry Chapter 3

CP Chemistry Chapter 3. Test review. Qualitative and quantitative measurements. Ben is taller than Jerry Ben is taller than Jerry, who is 6’1” Ben is 6’3” tall. Accuracy and precision. What do a group of numbers look like which are precise but not accurate?

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CP Chemistry Chapter 3

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  1. CP ChemistryChapter 3 Test review

  2. Qualitative and quantitative measurements • Ben is taller than Jerry • Ben is taller than Jerry, who is 6’1” • Ben is 6’3” tall

  3. Accuracy and precision • What do a group of numbers look like which are precise but not accurate? • If a group of numbers are accurate, are they precise?

  4. Significant figures in measurements • .00047 • 74000 • 7007 • 74000. • 74.00 • .007400 • What are the rules for addition? • What are the rules for multiplication?

  5. Rounding • .00753 3 sig figs • .00753 2 sig figs • .00753 1 sig fig • Remember that we round in order to observe the significant figures in calculations!! • Do the calculation, then round the number

  6. Scientific notation • .000000747 • 7470000000 • 7.47 • .0747 • Remember, when we make one side larger, we make the other side smaller

  7. Error and percent error • What is error • What is percent error

  8. SI system • The SI units for : • Length • Mass • Time • Temperature

  9. Prefixes • Milli • Kilo • Centi • Mega • What is .05 centimeter in meters?

  10. Liters and cubic centimeters • What is 1 milliliter? • What is the mass of a liter of water? • 1 liter of water is 1 kilogram • 1 cm3 = 1 g of water (@4°C) 1 liter 1 kilogram 10 cm

  11. Weight vs mass • Mass is a property of matter • Weight is a consequence of mass and gravity and can depend on location

  12. Temperature • Degrees centigrade • Kelvins • Conversion ??

  13. Volume calculations • Volume of rectangular solids • Volume of cylinders

  14. Density • Formula for density? • How do we calculate mass? • What about volume?

  15. Specific gravity • What is it? • What do we use it for?

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