Calculate the molality of ethanol solution in which the mole fraction of water is 0.88.

Explanation

To calculate the molality of an ethanol solution where the mole fraction of water is 0.88, we can follow these steps:

### Step 1: Understand the mole fraction
The mole fraction of water (x_water) is given as 0.88. Since the sum of the mole fractions of all components in a solution equals 1, we can find the mole fraction of ethanol (x_ethanol):
\[ x_{ethanol} = 1 - x_{water} = 1 - 0.88 = 0.12 \]

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