Some of the problems. I honestly have no clue how to do these/where to look for answers.

What is the concentration of 5.28*10^14 Carbon Tetrachloride molecules dissolved in 149 mL of water?

How many grams of Carbon Dioxide will there be in a 16.43 mL of a .03M solution.

More pertinent info.

Molarity = #mols/L of solution.

That equation plus the ones I posted before will work both of these problems.

Two problems I see, however, is that carbon tet is not soluble in water plus you don't list is you want molarity or molality. If you want molality, that is # mols/kg solvent.