posted by Mat on .
If 18.0g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O how many grams of H2Oare produced
First, notice that the chemical equation is not balanced. Add coefficients in front of the molecules of the reactants and/or products to get the number of atoms (C, H, O) for reactants = products.
Convert the 18g of CO2 by the molar mass (this can be computed by looking at the periodic table i.e. 12.01g + 2(16g)) to convert CO2 to moles. Using the mole ratio (i.e. the coefficients of CO2 and H2O), you can convert mol CO2 to mol H2O.