## R constant in Ideal Gas Law

$PV=nRT$

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### R constant in Ideal Gas Law

How do we know what units to use for the R constant in the Ideal Gas Law?

Lara Kristine Bacasen 1L
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### Re: R constant in Ideal Gas Law

It should say it on the equation sheet.

Hui Qiao Wu 1I
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### Re: R constant in Ideal Gas Law

When you plug in all the variables in the pv=nRT equation, you want to make sure all the units cancel out. The correct unit should give you only moles or some kind of pressure unit at the end (after the cancellation of units).

Dan M -3E
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### Re: R constant in Ideal Gas Law

R= 8.314 J/mol*K if the units we're using is atms, which is usually is.

Noe BM 1J
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### Re: R constant in Ideal Gas Law

I think the question would state which units you need to use. If not, pay attention to the units of pressure. For example, if you are given the pressure in order to find the volume, you should use the R constant that has the same units as pressure in order for them to cancel out each other.