The units of the van der Waals constant `a` are

Options

A. atm `L^2 "mol"^(-2)`
B. atm `L^(-2) "mol"^(-2)`
C. atm `L `mol
D. atm mol `L^(-1)`

Answer

A

Explanation

`P = (an^2)/(V^2) " or " a = (PV^2)/(n^2) = "atm" L^2 mol^(-2)`