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What is the concentration unit for atmospheric pollutants expressed as parts per million by volume?
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?
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?
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?
What does 1 ppb represent in terms of the volume of pollutant and volumes of air?
What does 1 ppm equal to in terms of parts per billion (ppb) and parts per trillion (ppt)?
What does 1 ppm equal to in terms of parts per billion (ppb) and parts per trillion (ppt)?
What does the concentration unit ppmv represent?
What does the concentration unit ppmv represent?
What does the concentration unit ppb represent?
What does the concentration unit ppb represent?
How is the concentration unit μg/m^3 defined?
How is the concentration unit μg/m^3 defined?
What does 1 ppm equal to in terms of parts per billion (ppb) and parts per trillion (ppt)?
What does 1 ppm equal to in terms of parts per billion (ppb) and parts per trillion (ppt)?
What is the molar mass M in the equation 1 ppm = 40.9 M μg/m^3?
What is the molar mass M in the equation 1 ppm = 40.9 M μg/m^3?
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