Determine the molarity of a 15.0 % by mass Hydrogen Peroxide solution. The density of Hydrogen Peroxide is 1.054 g/mL.

Question

The 15.0% by mass can be broken apart into 15.0 g Hydrogen Peroxide and 100.0 g solution. Use the density of Hydrogen Peroxide solution (1.054 g/mL) to convert g soln to mL soln.

Answer 1

15% w/w = 15 g H2O2/100 g solution.
mass = volume x density. You know mass and density, solve for volume in mL and convert to L.
mols H2O2 = grams/molar mass, then
M = mols/L solution.

Answer 2

31.05

Answer 3

idk lol