An aqueous solution of acetone, $C H_{3} C O C H_{3}$ , is $10.00 %$ acetone by weight. What is the mole percentage of acetone in this solution?

3.332 %

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5.000 %

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10.00 %

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11.11 %

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Solution

The correct option is A $3.332 %$
As given,
Acetone $= 10 g m$ , water $= 90 g m$
Mole $%$ of acetone $= \frac{10 / 58}{12 / 58 + 90 / 18} \times 100 = 3.33 %$

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