What is the molarity of pure liquid benzene?

Molarity is a concentration unit of solutions, pure benzene is not a solution so this term is meaningless for a pure liquid.

In other Words:

Molarity of a solution is a numerical way of saying exactly how much solute is dissolved in a solvent .Molarity is equal to the moles of solute divided by the liters of solution. Molarity of a solution can be calculated by using the following formula:

M= moles of solute/liters of solution