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Molality of pure liquid ethanol (C(2)H(5...

Molality of pure liquid ethanol `(C_(2)H_(5)OH)` if its density `d=1.2g//ml` is :

A

`0.83` m

B

50 m

C

`0.78` m

D

`21.74` m

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The correct Answer is:
D
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