RN Exam Practice
Pharmacological and Parenteral TherapiesQuestion 1611 of 2368

The prescription is for 150 mg of a liquid medication. The supply is 100 mg in 2 mL. How many milliliters should the nurse give?

  1. 1.3 mL
  2. 2 mL
  3. 3 mL
  4. 7.5 mL
Show answer

Correct answer: 3 mL

Multiply 2 mL by 150 mg and divide by 100 mg to get 3 mL. The mg units cancel, leaving mL.

Source: Nursing Skills, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Math Calculations: LIQUID CONCENTRATIONS. Licensed under CC BY 4.0.

Practice the topic "Pharmacological and Parenteral Therapies"

Questions last reviewed: 18 October 2026