What are the units of “b” in van der Waals equation?

Correct Answer: L/mol
The ideal gas equation is given as (P – an2/V2)(V – nb) = nRT. So by considering the equation, we can understand that the units of the volume are equal to the units of a number of moles X be so the units of b. So b’s units = volume / number of moles so it is L/mol.