Chem 103 Quiz 1 study guide

  1. The correct number of significant figures in the number 0.02090:
    4
  2. How many significant digits should be reported in the answer to the following calculation:
    (14.3-13.72) x 12.34=
    1
  3. Determine the answer to the following equation with correct number of significant figures:
    (4.123 x 0.12) + 24.2=
    24.7
  4. How many grams are in 1.48 x 107 ug?
    14.8
  5. What is the density (g/mL) of an object that has the mass of 0.03089 lbs and a volume of 0.29oz?
    • 1lb=453.6g
    • 1oz=29.57mL
    • 0.03089lb x 453.6g = 14.012g
    •                      1lb 
    • 0.29oz x 29.57mL = 8.57mL
    •                  1oz
    • d=m      d=14.012g = 1.6g/mL
    •     v           8.575mL
  6. Which state of matter has indefinite shape and is compressible?



    C. gas
  7. Which of the following items is a pure substance?



    A. ice
  8. Which of the following items is a mixture?



    D. brass
  9. Which of the following items is a physical property?



    B. the odor of spearmint gum
  10. If a solid piece of shiny sodium metal is exposed to chlorine gas, a large amount oh heat is released and white, solid, sodium chloride forms. Based on this information, which of the following is true?



    D. this process was exothermic
  11. A silver base has a mass of 247g and, when placed in 10.0mL of water, changes the water level to 173.5mL.
    Calculate the density of silver in g/mL:
    • ΔT= 173.5 - 150.0= 23.5mL
    • d=m   247g  = 10.5g/mL
    •      v  23.5mL
Author
karlap
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296506
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Chem 103 Quiz 1 study guide
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chem 103 quiz 1
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