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Calculating number of moles using PV=nRT

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(edited 9 years ago)
Looks like you forgot to convert from liters to cubic meters, so your answer is 1000 times too big!
Original post by alexschmalex
Looks like you forgot to convert from liters to cubic meters, so your answer is 1000 times too big!

I am told to use litres rather than dm^3/m^3 in my course.
I'm not to sure why buts it just how they work here.
Original post by T-GiuR
I am told to use litres rather than dm^3/m^3 in my course.
I'm not to sure why buts it just how they work here.


Well, they don't tell you to get the answer wrong, so you probably should convert anyway.
Original post by alexschmalex
Looks like you forgot to convert from liters to cubic meters, so your answer is 1000 times too big!

So if I divide by 1000 that should give me the answer in cubic meters ?
Also would the units be (Pa m^3) / (JMol^-1 K^-2) ?
Original post by T-GiuR
So if I divide by 1000 that should give me the answer in cubic meters ?
Also would the units be (Pa m^3) / (JMol^-1 K^-2) ?


Yeah, when using liters you either change the order of the gas constant or convert volume to cubic meters. A pascal is a newton over a meter squared so using liters would kinda mess it up :P
Original post by alexschmalex
Yeah, when using liters you either change the order of the gas constant or convert volume to cubic meters. A pascal is a newton over a meter squared so using liters would kinda mess it up :P

Thanks.
Are the units MolK^2 ?

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