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What is the mole fraction of glycerin C3H5(OH)3 in a solution containing 33 g of glycerin, 60 g isopropyl alcohol and rest water?

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0.258

0.359

0.205

0.480

answer is C.

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Detailed Solution

Mw of glycerin =92 g/mol

Number of moles of glycerin

=33/92=0.3587 mol
Number of moles of isopropyl alcohol

=60g/(60 g/mole)=1 mole
Number of moles of water

=7 g/(18 g/mole)=0.3889 mole
Mole fraction of glycerin

=0.3587/(0.3587+1+0.3889) =0.205

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