What mass of ethanol is added to 1.0 kg water to have the mole fraction of ethanol equal to 0.25 ?
What mass of ethanol is added to 1.0 kg water to have the mole fraction of ethanol equal to 0.25 ?
(a) 63.89 gm
(b) 6.39 gm
(c) 638.89 gm
(d) 683.89 gm
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