cbse class 11 jee mains question mop
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ANSWER = 0.2
no. of moles of ethanol = 0.75 mol
no. of moles of water =given mass / molar mass
= 54 / 18
= 3 mol
Mole fraction of ethanol = 0.75 / (0.75 + 3)
= 0.19 ≈ 0.2
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