Question

X grams of water mixed in 69 grams of ethanol molefraction of ethanol in the resultant solution is 0.6 .what is the value of X in grams

Answer 1

Answer:

26.4 grams

Explanation:

mole fraction = moles of eathnol ÷ total no of moles in solution

molar mass of C2H5OH is 46

given mass of ethanol is 96

we get no. of moles of ethanol 2.08

now, using formula of mole fraction

0..6 = 2.08÷(n+2.08)

here n = no. of moles of water

on solving

n=1.4

now n = mass of water÷ molar mass of water

molar mass of water =18

so mass of water used i.e X = 26.4 g

Answer 2

Answer:

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