Maximum Concentration of Benzene possible A question for my PhysOrg course states: 


  Assume you are performing a reaction in which benzene is a reagent. What is the maximum concentration of benzene possible? Hint: what facts do you need to know to determine concentration? 


I understand concentration is amount per volume in mol/L, but I'm not sure how to proceed from there.
Sorry, I figured it out- just substitute mols for mass/MW and density  for volume and rearrange until you get density/MW