Final answer:
The volume/volume percentage (V/V%) of a solution with 15 mL of alcohol in 60 mL of water is calculated by dividing the volume of alcohol by the total volume of the solution, resulting in 20.0%.
Step-by-step explanation:
To calculate the volume/volume percentage (V/V%) of a solution with 15 mL of alcohol in 60 mL of water, you need to divide the volume of solute (alcohol) by the total volume of the solution (alcohol + water), and then multiply the result by 100 to get the percentage.
Here is the calculation:
(Volume of alcohol) / (Volume of alcohol + Volume of water) × 100
(15 mL) / (15 mL + 60 mL) × 100 = (15 mL) / (75 mL) × 100
0.2 × 100 = 20%
Therefore, the V/V% of the solution is 20.0%.