Certified Nursing Assistant (CNA) Prometric Practice Exam

To convert four ounces of liquid to milliliters, the nurse aide should multiply by what factor?

1. 10 mL

2. 20 mL

3. 25 mL

4. 30 mL

The correct answer is: 30 mL

To convert ounces to milliliters, you need to know the conversion factor between these two units. One ounce is approximately equal to 30 milliliters. Therefore, when converting four ounces, you multiply 4 by 30, which yields 120 milliliters. This conversion is crucial in healthcare settings, as accurate medication dosing and fluid management are vital for patient safety and treatment efficacy. Understanding these conversions helps nurse aides and other healthcare professionals ensure they are administering the correct amounts of liquid, whether it's for medications or hydration. In this case, the choice of multiplying by 30 mL aligns with the standard conversion rate from ounces to milliliters, making it the correct answer for converting four ounces to milliliters.