What is the equivalent of 1 quart in milliliters?
960 mL
1,000 mL
240 mL
480 mL
The Correct Answer is A
A. 960 mL: One quart is approximately equal to 946 mL, which is commonly rounded to 960 mL for clinical calculations. This rounded value is frequently used in nursing practice to allow safe and practical fluid conversions.
B. 1,000 mL: One thousand milliliters is equivalent to 1 liter, not 1 quart. Although the volumes are close, they are not interchangeable in medication or fluid calculations.
C. 240 mL: Two hundred forty milliliters equals 1 cup, not 1 quart. This volume represents only one-fourth of a quart and is significantly lower than the correct conversion.
D. 480 mL: Four hundred eighty milliliters equals 2 cups or 1 pint. Since 1 quart equals 2 pints, this value represents only half of a quart.
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Related Questions
Correct Answer is B
Explanation
A. It is based on units of 10: The metric system, not the apothecary system, is based on units of 10. This allows for easy conversion between units like grams, liters, and meters.
B. It uses Roman numerals and fractions: The apothecary system often uses Roman numerals and fractional notation (e.g., ℥ for ounces, ℨ for dram) to indicate quantities. This differs from the metric system’s decimal-based, standardized measurements and is less commonly used today due to complexity.
C. It is the most commonly used system in healthcare today: The metric system is the standard in modern healthcare for medication dosing and measurements. The apothecary system is largely historical and rarely used.
D. It measures exclusively in milliliters: Measuring exclusively in milliliters is a feature of the metric system, not the apothecary system. Apothecary measurements include units like grains, drams, and ounces rather than standardized metric volumes.
Correct Answer is A
Explanation
Ordered Dose: 25 mg
Available Concentration: 50 mg/5 mL
- Calculate the volume to administer
Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration
Volume to administer = (25 ÷ 50) × 5
Volume to administer = 0.5 × 5
Volume to administer = 2.5 mL
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