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Old 03-02-2009, 03:59 AM
JohnS JohnS is offline
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Default Re: Convert ppm to mol%

Originally Posted by Margarida Correia
Please i need to convert 1ppm of Hydrogen Sulfide to mol %
What kind of ppm? Ppm can be specified as a ratio by mass, volume or mole fraction. If by mole fraction. 1 ppm is 0.0001%. If not by molae fraction, by what basis, and what is the other constituent?

If it is hydrogen sulphide mixed in another gass, the ppm is most likely expressed as a mole fraction.
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