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Topic: mole fractions 3 components  (Read 3125 times)

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Offline beakin

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mole fractions 3 components
« on: October 20, 2008, 02:52:17 AM »
so..
Calculate the mole fraction of each component in a mixture composed of equal masses of ethanol(C2H5OH) water(H2O), and ethylene glycol (C2H6O2)

Ive been trying to use the formula xsolute(mole fraction) = nsolute / (nsolute + nsolvent)

but no combinations seem to get me the right answer am i on the wrong track?/

thanks
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Offline AWK

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Re: mole fractions 3 components
« Reply #1 on: October 20, 2008, 03:48:28 AM »
ncomponent / (sum_of_n_of_all_components)
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Offline beakin

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Re: mole fractions 3 components
« Reply #2 on: October 20, 2008, 04:14:41 AM »
i still cant get the right answer....

for finding n wouldnt it just be the molar mass because m is constant so it can just be cancelled out? i keep  getting .365 for the first component but apparently the answer is .232
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Offline Borek

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Re: mole fractions 3 components
« Reply #3 on: October 20, 2008, 04:59:54 AM »
Assume you have mixed 100 g of each substance.

How many moles of first?

How many moles of second?

How many moles of third?

How many moles total?

Molar fraction of first?
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