Homework Help: Chemistry

Posted by Jones on Saturday, September 8, 2012 at 5:08pm.

Calculate mole solute in solution?
I added an amount of an unknown sample to a solution. I found that the molality of the solution is 0.085m and there is 0.0156kg of solvent. Calculate the moles of solute present in solution?

Thanks!

Chemistry - TutorCat, Saturday, September 8, 2012 at 5:55pm
molality = moles of solute/kilograms of solvent

notice how the units cancel out to moles of solute:

(moles of solute/kg of solvent)*(kg)= moles of solute
Chemistry - Jones, Saturday, September 8, 2012 at 6:06pm
So for the example above would the moles be 0.18 mol?
Chemistry - DrBob222, Saturday, September 8, 2012 at 6:21pm
molality x kg solvent is not your answer.

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