Atmospheric Chemistry Concentration Units Quiz

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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?

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

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

10^3 ppb = 10^6 ppt Signup and view all the answers

What does the concentration unit ppmv represent?

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

What does the concentration unit ppb represent?

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

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

Micrograms of pollutant per cubic meter of air Signup and view all the answers

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

1 ppm = 10^3 ppb = 10^6 ppt Signup and view all the answers

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

Molar mass of the gaseous pollutant Signup and view all the answers

Atmospheric Chemistry Concentration Units Quiz

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Questions and Answers

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

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

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

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 the concentration unit ppmv represent?

What does the concentration unit ppb represent?

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

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