How many mL are in 1.5 liters?

To understand why 1.5 liters equate to 1500 mL, it's important to recognize the relationship between liters and milliliters. Specifically, 1 liter is equal to 1000 milliliters. Therefore, when converting liters to milliliters, you multiply the number of liters by 1000.

In this case, for 1.5 liters:

1.5 liters × 1000 mL/liter = 1500 mL.

This conversion confirms that there are 1500 mL in 1.5 liters, making it the correct answer. Understanding this basic unit conversion is essential in medical math, as it aids in accurately measuring and administering liquids in clinical settings.