1. The problem statement, all variables and given/known data http://i.imgur.com/Rz0qB.png 2. Relevant equations The answer is B, but I would like to know how to find the answer. Molarity = moles * volume 3. The attempt at a solution Yep, I tried for 15+ minutes and couldn't get the darn units to cancel out. A worked out solution would be very helpful.