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April 17, 2014

Homework Help: chemistry

Posted by Vic on Sunday, September 30, 2012 at 11:23pm.

a 250.0 ml sample of an aqueous solution at 25 degrees celsius contains 35.8 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 11.25 mmHg, what is the molar mass of the unknown compound?

I know you need to have the answer in g/mol. I have grams (0.358 g), but am having a hard time figuring out how to find mols.

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