I've tried this problem a couple times, but can't seem to come up with the proper answer.

Question:
Consumer products express concentrations in mg/volume or g/volume because the general public isn't familiar with molarity.
a) A medium-sized (296 mL) cup of coffee contains 0.10 g caffeine, C8H10N4O2. Express this concentration in molarity.

My work:
0.10 g C8H10N4O2/296 mL X 1mol/74g X 1 mL/10-3 L

I'm not sure where to go from here. I keep getting 4.56, which the textbook says is wrong. Is anyone able to point me in the right direction?

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-