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density

Posted: Wed Jan 29, 2020 10:29 am
by Sophia Dinh 1D
how can you use density in PV=nRT?

Re: density

Posted: Wed Jan 29, 2020 11:19 am
by VioletKo3F
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
by Michelle N - 2C
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
by Hannah Romeo 1J
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
by Aarushi Solanki 4F
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
by Juliana Chopelas 1A
You can use density to find "n" or even replace "n" in PV=nRT since density is mass/volume