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April 24, 2014

Homework Help: chemistry

Posted by aa on Saturday, July 14, 2012 at 10:14am.

A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm g/mL}, respectively. For this solution, calculate each of the following.
find 1 ) molality
2) percent by mass
3) moles fraction
4 )mole fraction
5) molarity

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