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The nurse prepares to give 5 mg of a medication, but the vial label reads "10 mg/mL." How many mL should the nurse administer?

0.25 mL

1 mL

0.5 mL

5 mL

Answer and Explanation

The Correct Answer is C

Calculation:

Prescribed dose = 5 mg

Available concentration = 10 mg per 1 mL

Calculate the volume in milliliters (mL) to administer.

Volume (mL) = (Prescribed dose (mg) / Available concentration (mg/mL))

= (5 mg / 10 mg/mL)

= 0.5 mL.

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Correct Answer is D

Explanation

A. 15 mL = 3 tsp/1 tbsp: This is a correct conversion. One teaspoon equals 5 mL, so 3 teaspoons equal 15 mL, which also equals 1 tablespoon. This measurement is accurate and safe for patient use.

B. 10 mL = 2 tsp: One teaspoon equals 5 mL, so 2 teaspoons equal 10 mL. This conversion is correct and aligns with standard household equivalents.

C. 30 mL = 6 tsp: Six teaspoons multiplied by 5 mL per teaspoon equals 30 mL. This conversion is accurate and does not require questioning.

D. 30 mL = ½ OZ: One ounce equals 30 mL, so ½ ounce equals 15 mL, not 30 mL. This conversion is incorrect and could result in a doubling of the prescribed dose, making it unsafe.

A. 15 mL B. 7.5 mL C. 5 mL D. 10 mL

Correct Answer is A

Explanation

Given volume = 0.5 oz

Conversion factor: 1 oz = 30 mL

Calculate the volume in milliliters (mL).

Volume (mL) = Volume in oz x Conversion factor

= 0.5 oz x 30 mL/oz

= 15 mL

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The nurse prepares to give 5 mg of a medication, but the vial label reads "10 mg/mL." How many mL should the nurse administer?

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