How many moles does a #44*g# mass of carbon dioxide represent?
Well, a mass
Now the molar mass of
And thus the quotient:
Now look at the formula, each formula unit of
This idea of equivalence, of the use of mass to specify the precise numbers of atoms and molecules that are present is central to the idea of stoichiometry. If you can master this idea, you won't have too much trouble with chemical calculations. Work at it, and a little bit of study will pay off. Good luck.