Convert 1.5 liters to mL.

To convert liters to milliliters, it's important to know the conversion factor between these two units of measurement. One liter is equivalent to 1000 milliliters. Therefore, to convert 1.5 liters to milliliters, you multiply the number of liters by 1000.

This means:

1.5 liters × 1000 mL/liter = 1500 mL.

So, the correct answer is indeed 1500 mL. Understanding this conversion is crucial in many medical and healthcare settings where precise measurement of liquids is necessary, such as in medication dosing or IV fluid administration. Knowing that 1 liter equals 1000 milliliters allows practitioners to quickly and accurately convert between these commonly used units.