Calculate how many mL are in 3.5 liters.

To convert liters to milliliters, it's essential to know that 1 liter is equivalent to 1000 milliliters. Therefore, when converting 3.5 liters to milliliters, you multiply by 1000:

3.5 liters × 1000 mL/liter = 3500 mL.

This calculation shows that there are 3500 milliliters in 3.5 liters. The correct answer reflects an accurate application of the conversion factor between liters and milliliters. Understanding this conversion is fundamental in medical settings where precise measurements of liquids are often necessary.