Final answer:
The final concentration of ethanol in the solution is 60%.
Step-by-step explanation:
To find the final concentration of ethanol, we can use the formula:
final concentration of ethanol = (volume of ethanol / total volume of solution) * 100%
Given that the initial volume of wine containing 10.0% ethanol is 120ml and the total volume after dilution is 200ml, we can substitute these values into the formula:
final concentration of ethanol = (120ml / 200ml) * 100% = 60%
Therefore, the final concentration of ethanol is 60%.