Convert 2.5 liters to milliliters.

To convert liters to milliliters, you need to know the relationship between the two units: 1 liter is equivalent to 1000 milliliters. Therefore, to convert 2.5 liters to milliliters, you multiply 2.5 by the conversion factor of 1000 mL per liter:

2.5 liters × 1000 mL/liter = 2500 mL.

This confirms that 2.5 liters is equal to 2500 milliliters, making the correct choice the second option. Understanding this conversion is essential in medication administration where precise measurements are crucial for patient safety.