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 BHSS Chemistry
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 Introduction to Chemistry and Measurements
 

  Students should be able to...

  • Define chemistry
  • Write the symbol and name of common elements
  • Describe the major areas of study in chemistry (organic, inorganic, analytical, physical, and biochemistry)
  • Describe the difference between mass and weight
  • Describe the difference between accuracy and precision
  • Describe the scientific method and how its used
  • List the SI base units for length, mass, volume, time, and temperature
  • List and convert using the SI prefixes: kilo-, centi-, and milli-
  • Convert temperatures from degrees Celcius to Kelvin (add 273) or from Kelvin to degrees Celcius (subtract 273)
  • Convert mass, length, and volume, and temperature between the SI and English systems (2.54 cm = 1 inch, 454 g = 1 pound, .946 L = 1 quart)
  • Calculate the density of a solid (mass / volume)
  • Express numbers in scientific notation
  • Express scientific notation in decimal form
  • Compute numbers in scientific notation using a calculator
  • Be familiar with the following terms:  theory, law
  • Decide if a digit in a number is "significant"
  • Round answers to arithmetic problems to reflect the precision of the number


    Sample Problems for Chapters 1 and 2

    Convert.

    1. 58.2 mm to cm
    2. 63.1 degrees C to Kelvin
    3. 13.5 km to miles
    4. 1.31 L to mL
    5. 8750 seconds to hours
    6. 13 gallons to L
    7. 20000 seconds to days
    8. 202 kilograms to pounds

    Express in scientific notation.

    9. 45300000 ____________________________________
    10. 0.000461 ____________________________________
    11. 0.0212 ____________________________________
    12. 3430 ____________________________________
    13. 0.002 ____________________________________

    Express in decimal form.

    14. 4.94 X 103 __________________
    15. 2.312 X 10-5 __________________
    16. 1.11 X 103 __________________
    17. 3.92 X 103 __________________
    18. 8.72 X 10-2 __________________

    State the number of significant digits in each measurement.

    19. 470 birds _____
    20. 0.003 mL _____
    21. 320. g _____
    22. 0.2540 km _____
    23. 200000 ants _____

    Solve. Round each answer accordingly.

    24. 480 X 2.875 =
    25. 9.81 / 4 =
    26. 2.34 + 5.1204 + 9.63 =

    Convert.

    27. 98 degrees C to Kelvin
    28. 73 degrees C to K
    29. 374 K to degrees C
    30. 17 K to degrees C

    31. Breifly describe the five main areas of chemistry.

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 Last updated on December 2, 2002 8:44 AM