The most important unit is T; T must be in degrees Kelvin. If pressure is in atmospheres and volume is in liters, the units of R equal "liter atm mol^1 K^1" and the value
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R is the gas constant which is dependent on the units of
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1. Multiply the pressure times the volume. For example, if the pressure equals 4 atm and the volume equals 11.207 L, multiply 4 by 11.207 to get 44.828 atm*L. 2. Divide the result
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PV=nRT is the ideal gas law. P is pressure, V is volume, n is the moles of the gas, R is a constant and is equals 8.314 J/K(mol) and T is temperature measured in Kelvin.
http://wiki.answers.com/Q/What_is_PV_equals_nRT
