posted by john .
2H202--> 2H20 +O2
Given that you started with ½ cup of H2O2, what was the mass of each product in the reaction? (1/2 cup = 118.3 mL, density of H2O2 is 1.4 g/mL)
Convert volume of H2O2 (the 1/2 cup) to grams H2O2 using density.
Convert grams H2O2 to mols using mols = g/molar mass.
Convert mols H2O2 to mols H2O using the coefficients in the balanced equation.
Convert mols H2O to grams using mols x molar mass = grams.
Follow the same procedure for determining the grams of O2 in the product.
Post your work if get stuck.