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I'm having a lot of trouble with a simple problem. I have a 3.0% by man solution of H2O2 in H2O. The density of thr solution is 1.0 g/mL. I need to find the molarity. How do I do this? So far I have:

3.0g H2O2 x 1 mol/34.02 g= .0881 mol

I'm not sure where to go or what to do with density, though.

Assume 100 grams of solution.That means three grams of peroxide, and ninety-seven of water.

Molarity= molesH2O2/volume solution

using the density, the volume is 100ml

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