Answer to Question #231417 in Chemical Engineering for pavani

Question #231417

21.What are the different concentration scales to measure air pollutants in the atmosphere?


1
Expert's answer
2021-09-12T07:25:08-0400

Concentrations are most commonly expressed as mass per unit volume (e.g micrograms per cubic meter, gram per cubic liter, etc)"."


However, for gases, volume percent, mole percent and parts per can be used also i.e 1 volume percent = 10,000 ppmv (i.e., parts per million by volume) with a million being defined as 106.


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