If I contain 3 moles of gas in a container with a volume of 60 liters and at temperature of 400 K, what is the pressure inside the container?
Ideal Gas Law: PV=nRT
I know I'm given the volume, temperature, and numbers of moles of gas, but how do I know which ideal gas constant (R) to use in order to find the pressure?
R= 0.0821 if pressure is in atm
R= 8.31 if used if pressure is in kPa

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  1. It depends upon the units you want for pressure in the answer. If you want the pressure in units of kPa use 8.31. If you want the pressure in units of atm use 0.08206.

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