A solution is labelled 0.9% w/v. How much drug is present in a 500 mL bag?
Correct answer: B. 4.5 g
- A. 0.45 g
- B. 4.5 g
- C. 9 g
- D. 45 g
Explanation
A 0.9% w/v solution contains 0.9 g in each 100 mL. For 500 mL, 0.9 × 5 = 4.5 g.
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About Drug Calculations and Dosage
Drug calculations apply measurement systems, unit conversions, dosage formulas, tablet and liquid doses, percentage and ratio strength, and weight based dosing. Work also includes calculating IV flow rates, infusion times and doses for children, while distinguishing the prescribed dose from the available concentration.
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