posted by Anonymous .
Hydrogen peroxide can be prepared by the reaction of barium peroxide with sulfuric acid according to
BaO2+H2SO4 -> BaSO4 +H2O2
How many milliliters of 3.50 M H2SO4(aq) are needed to react completely with 12.1 g of BaO2(s)?
Convert 12.1 g BaO2 to mols. mol = g/molar mass
Use the coefficients in the balanced equation to convert mols BaO2 to mols H2SO4.
Then M H2SO4 = mols H2SO4/L H2SO4. You know M and mols solve for L and convert to mL.