What are the dimensions and `SI` units of van der Waal's constants a and b?

Answer

`[a]=[ML^(5)T^(-2) mu^(-2)]` and units `J m^(3)//mol^(2)` while `[b]=[L^(3)mu^(-1)]` and units `m^(3)//mol`

Explanation

`(P+(n^(2)a)/V^(2))(V-nb)=` constant
Diensions of `(n^(2)a)/V^(2)`= dimensions of P
Dimension of nb= Dimensions of V