consider mixing 3.5L of co2 and 1.8L of h2o at 35C and 740mm Hg. determine the mass of the unbalanced reaction.

Question

CO2 + H2O = C4H10 + O2

Answer 1

Use PV = nRT and solve for n CO2 (mols CO2). Do the same for n H2O.
The wording is confusing. Do you want the mass of the reaction as is or do you want it balanced first. I would think balanced first, then the mass of the balanced equation. If so, then
balance the equation.
Use mols of each to determine the limiting reagent, use stoichiometry to determine mols of each product formed, then convert to grams of each. Finally, add the grams for the total mass.