Illinois CNA State Practice Exam

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How many milliliters (mL) are equivalent to 1 ounce (oz)?

  1. 10 mL

  2. 20 mL

  3. 30 mL

  4. 40 mL

The correct answer is: 30 mL

One ounce is equivalent to approximately 30 milliliters (mL). This conversion is based on the standard measurement used in the metric system, where 1 ounce is defined as 29.57 mL. For practical purposes, particularly in healthcare settings, this value is commonly rounded to 30 mL for ease of use. Understanding this conversion is essential in many clinical tasks, such as medication administration and fluid intake calculations, where precise measurement is crucial for patient safety and effective care.

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