Chem 103 Quiz 1 study guide

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karlap
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296506
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Chem 103 Quiz 1 study guide
Updated:
2015-02-22 14:26:02
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chem 103 chemistry
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chem 103 quiz 1
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  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?
    A. solid
    B. liquid
    C. plasma
    D. gas
    D. gas
    (this multiple choice question has been scrambled)
  7. Which of the following items is a pure substance?
    A. seawater
    B. brass
    C. air
    D. ice
    D. ice
    (this multiple choice question has been scrambled)
  8. Which of the following items is a mixture?
    A. helium
    B. brass
    C. gold
    D. water
    B. brass
    (this multiple choice question has been scrambled)
  9. Which of the following items is a physical property?
    A. the corrosive actions of acid rain on granite
    B. the combustion of gasoline
    C. the odor of spearmint
    D. the tarnishing of a copper statue
    C. the odor of spearmint gum
    (this multiple choice question has been scrambled)
  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?
    A. this process was exothermic
    B. mass is lost during the process
    C. sodium chloride is an element
    D. this process represents a physical change
    A. this process was exothermic
    (this multiple choice question has been scrambled)
  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

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