Question

pl s answer this now fastly

Answer 1

Answer:

atm dm^6 mol^(-2)

Explanation:

The answer can be found by unitary method. The quantity

$\frac{a{n}^{2}}{ {v}^{2} }$

has same unit as pressure since we can add same physical quantity only, and if you multiply this quantity by volume square and divide by mol square then you'll get the unit of a.