Homework Help: Chemistry

Posted by Anonymous on Saturday, October 3, 2009 at 4:50pm.

Determine the molar concentration of ethanol (C2H6O) in a wine that is 14% ethanol by mass. The density of this wine is 0.93 g/cm^3.

Chemistry - DrBob222, Saturday, October 3, 2009 at 4:58pm
14% by mass means 14 g ethanol per 100 g solution. So the 100 g consists of 14 g ethanol + 86 g water. How many moles are in 14 g? 14/molar mass ethanol.
How many cc are in 100 g soln with a density of 0.93 g/cc?
Then molarity = moles/L solution.

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