### Gas concentration

Posted:

**Tue Nov 21, 2017 11:57 pm**How do you find the concentration of a gas given the partial pressure?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=49&t=23813

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Posted: **Tue Nov 21, 2017 11:57 pm**

How do you find the concentration of a gas given the partial pressure?

Posted: **Wed Nov 22, 2017 12:00 am**

To convert between partial pressure and concentration of a gas, you would use the Ideal Gas Law: PV=nRT.

Simplifying the equation would give: concentration=P/(RT)

Simplifying the equation would give: concentration=P/(RT)

Posted: **Wed Nov 22, 2017 6:21 pm**

The concentration is equal to n/v since it is moles of substance over its volume. So when you rearrange the equation from PV = nRT, n/V = P/RT. n is the moles of gas, V is the volume of gas, P is is the pressure of the gas, R is the gas constant, and T is the absolute temperature of the gas.