If I used 24.6 g of of 0.83 M HC2H3O2 (aq) (0.83 mol per 1 L of solution), how much carbon dioxide would be produced? (IT IS ASSUMED YOUR ANSWER IS IN L CO2 so you do not need to include that in your answer.)

24.6 grams HAc? What's the density of the solution. We need to convert grams to volume. And what are you reacting the HAc with to produce CO2?