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### density

Posted: Wed Jan 29, 2020 10:29 am
how can you use density in PV=nRT?

### Re: density

Posted: Wed Jan 29, 2020 11:19 am
Since density is mass over volume, you can substitute the mass in n and the volume in v in the equation pv = nrt. Once this is done, the equation can be rewritten as molar mass = dRT/P.

### Re: density

Posted: Mon Feb 10, 2020 8:48 am
The density can be used toward PV=nRT when there are problems that doesn't give you the moles of the molecule. For example, a problem might give you the amount in mL, and so we'd convert it to moles via density (at least that's what I've been told through the sessions). Hope that helps!

### Re: density

Posted: Mon Feb 10, 2020 9:30 am
Density is mass/volume (g/cm^3) and can be substituted into the ideal gas equation using algebra.

### Re: density

Posted: Mon Feb 10, 2020 10:08 am
Density is given in g/mL. Sometimes, the problem gives the amount of a substance in mL, and you can convert this value to grams and then moles to find the 'n' in PV=nRT.

### Re: density

Posted: Sun Feb 16, 2020 3:08 pm
You can use density to find "n" or even replace "n" in PV=nRT since density is mass/volume