Calculate the mole fraction of ethylene glycol `(C_(2)H_(6)O_(2))` and water in a solution containing `20%` of `C_(2)H_(6)O_(2)` by mass.

Explanation

To calculate the mole fraction of ethylene glycol (C₂H₆O₂) and water in a solution containing 20% of C₂H₆O₂ by mass, we can follow these steps:

### Step 1: Determine the Mass of Solute and Solvent
Given that the solution is 20% ethylene glycol by mass, we can assume a total mass of the solution for simplicity. Let's assume we have 100 grams of the solution.

- Mass of ethylene glycol (solute) = 20% of 100 g = 20 g
- Mass of water (solvent) = 100 g - 20 g = 80 g

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