Homework Help: Chemistry

Posted by Cheyenne on Thursday, September 23, 2010 at 8:45pm.

How many grams of sucrose (C12H22O11) must be dissolved in 60 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.

Chemistry - DrBob222, Thursday, September 23, 2010 at 9:25pm
let moles C12H22O11 = x
moles H2O = 60/18 = 3.33 but check that.
X_sucrose = x/total moles and
0.2 = x/(x+3.33)
solve for x = moles sucrose.
g = mols x molar mass.
Check my work.

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