Which unit conversion is correct?

Which unit conversion is correct?

• A. 1 L equals 1000 ml
• B. 1 L equals 100 ml
• C. 1 L equals 10 ml
• D. 1 L equals 500 ml

Answer: (A)

The main idea is how metric prefixes work when converting units of volume. A liter is the base unit, and a milliliter is one-thousandth of a liter. That means you multiply by 1000 to go from liters to milliliters: 1 L × 1000 = 1000 mL. So 1 liter equals 1000 milliliters. The other options would correspond to 0.1 L (100 mL), 0.01 L (10 mL), and 0.5 L (500 mL), which are not equal to 1 L. Remember: to convert L to mL, multiply by 1000; to convert mL to L, divide by 1000.

The main idea is how metric prefixes work when converting units of volume. A liter is the base unit, and a milliliter is one-thousandth of a liter. That means you multiply by 1000 to go from liters to milliliters: 1 L × 1000 = 1000 mL. So 1 liter equals 1000 milliliters.

The other options would correspond to 0.1 L (100 mL), 0.01 L (10 mL), and 0.5 L (500 mL), which are not equal to 1 L. Remember: to convert L to mL, multiply by 1000; to convert mL to L, divide by 1000.