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Atmospheric Chemistry Concentration Units Quiz
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Atmospheric Chemistry Concentration Units Quiz

Created by
@DexterousMossAgate4378

Questions and Answers

What is the concentration unit for atmospheric pollutants expressed as parts per million by volume?

  • ppm(1 in 10^6) (correct)
  • ppt(1 in 10^12)
  • %(v/v) or % (mol/mol)
  • ppb(1 in 10^9)

    • What does 1 ppmv (parts per million by volume) represent?

  • 10^-4 % by volume
  • mL/m^3
  • 1 L pollutant / 10^6 L air
  • 1 volume of gaseous pollutant/10^6 volumes of air (correct)

    • How is the concentration unit μg/m^3 defined?

  • M μg/m^3 = 40.9 (molar mass of a gaseous pollutant)
  • 1 vol pollutant/10^9 volumes of air
  • 0.0409 (M) μg/m^3
  • μg of a pollutant / m^3 of air at 25˚C and 1 atm (correct)

    • What does 1 ppb represent in terms of the volume of pollutant and volumes of air?

    <p>1 vol pollutant/10^9 volumes of air</p> Signup and view all the answers

    What does 1 ppm equal to in terms of parts per billion (ppb) and parts per trillion (ppt)?

    <p>10^3 ppb = 10^6 ppt</p> Signup and view all the answers

    What does the concentration unit ppmv represent?

    <p>1 volume of gaseous pollutant/10^6 volumes of air</p> Signup and view all the answers

    What does the concentration unit ppb represent?

    <p>1 volume of pollutant/10^9 volumes of air</p> Signup and view all the answers

    How is the concentration unit μg/m^3 defined?

    <p>Micrograms of pollutant per cubic meter of air</p> Signup and view all the answers

    What does 1 ppm equal to in terms of parts per billion (ppb) and parts per trillion (ppt)?

    <p>1 ppm = 10^3 ppb = 10^6 ppt</p> Signup and view all the answers

    What is the molar mass M in the equation 1 ppm = 40.9 M μg/m^3?

    <p>Molar mass of the gaseous pollutant</p> Signup and view all the answers

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