Chapter 7 - Measurement - 7.3 The Metric System - Capacity and Weight (Mass) - 7.3 Exercises - Page 502: 31

3 L

3000 mL to L Unit for the answer (L) is in numerator; unit being changed (ml) is in denominator so it will divide out. The unit fraction is $\frac{1 L}{1000 ml}$ Multiply 3000 ml times to the unit fraction 3000 ml * $\frac{1 L}{1000 ml}$ = 3 L