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The concentration of grain alcohol (C2H5OH) in whisky is given in degrees proof, which is twice the percent alcohol by volume (v/v). What are the

The concentration of grain alcohol (C2H5OH) in whisky is given in "degrees proof", which is twice the percent alcohol by volume (v/v). What are the mole fraction and molality of C2H5OH in 85proof vodka? Assume that vodka is a solution of only C2H5OH and water and that the volumes are additive. The density of C2H5OH is 0.79 g/mL.

Mole Fraction

Molality

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