A solution of hydrogen peroxide is 23.6% H₂O₂ by mass and has a density of 1.11 g/cm³.The molarity of the solution is: A)7.23 M B)0.262 M C)7.70 M D)8.03 M E)none of these

Question

Quizplus · Accepted Answer

First, we need to calculate the molar mass of hydrogen peroxide (H2O2):
Molar mass of H2O2 = 2(1.008) + 2(15.999) = 34.014 g/mol

Next, we need to use the density of the solution to calculate the volume of the solution that contains 1 mole of H2O2:
Density = mass/volume
Volume = mass/density = (1 mol x 34.014 g/mol)/1.11 g/cm3 = 307.0 cm3

Finally, we can calculate the molarity of the solution:
Molarity = 1 mol/307.0 cm3 = 0.00326 mol/cm3 = 7.70 M

Therefore, the best choice is (C).

A Solution of Hydrogen Peroxide Is 23