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Mole fraction of ethanol in an aqueous s...

Mole fraction of ethanol in an aqueous solution of ethanol and water is 0.1. The mass percent of ethanol is

A

10

B

90

C

22

D

78

Text Solution

Verified by Experts

The correct Answer is:
C
Let moles of ethanol = x, then moles of water = 9x
Mass of ethanol = 46x
Mass of water = 162x
`therefore` mass % of ethanol = `(46x)/(208x)xx100=22%`
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