Final answer:
The mol fraction of ethanol in a solution composed of 0.504 mol ethanol and 4.06 mol water is calculated by dividing the moles of ethanol by the total moles in the solution, resulting in a mol fraction of approximately 0.1104.
Step-by-step explanation:
To calculate the mol fraction of ethanol in a solution with 0.504 mol of ethanol and 4.06 mol of water, we first determine the total number of moles in the solution by adding the moles of ethanol to the moles of water:
Total moles = moles of ethanol + moles of water
Total moles = 0.504 mol + 4.06 mol
Total moles = 4.564 mol
Next, we calculate the mol fraction of ethanol by dividing the moles of ethanol by the total moles of the solution:
Mol fraction of ethanol = moles of ethanol / total moles
Mol fraction of ethanol = 0.504 mol / 4.564 mol
Mol fraction of ethanol = 0.1104 (approx)
Therefore, the mol fraction of ethanol in this solution is approximately 0.1104.