how do I solve the molarity of 72.0g C2H6O in 2.22L of solution

Question

anonymous · Answer

Well this is a the physics section.. but I'll see if I can be of some help regardless! Molarity is simply the concentration of a compound/molecule in a solution. In standard units, its expressed in moles per liter. This should give you a pretty good hint at what you need to do to solve this problem.

First you need to find the number of moles of C2H6O that would make up 72 grams. You can do this by calculating the molar mass, then dividing 72 by the molar mass.

Then, once you have the number of moles, you just have to divide it by the volume. Remember that the number of moles of C2H6O is not your molarity. That would be the number of moles per 2.2 liters, however molarity would be the number of moles per one liter (hence dividing by volume).

Good luck and let me know if you have any questions