The order is 1 mg/min; the solution concentration is 0.2 mg/mL. What is the rate in mL/min?

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Multiple Choice

The order is 1 mg/min; the solution concentration is 0.2 mg/mL. What is the rate in mL/min?

Explanation:
To find the rate in mL/min, use the relationship that the mass flow rate equals concentration multiplied by volume flow rate. Here, the drug amount per minute is 1 mg/min, and the solution concentration is 0.2 mg/mL. So the volume delivered per minute is 1 mg/min divided by 0.2 mg/mL, which is (1 ÷ 0.2) mL/min = 5 mL/min. In other words, delivering 5 mL each minute provides 1 mg of drug at that concentration.

To find the rate in mL/min, use the relationship that the mass flow rate equals concentration multiplied by volume flow rate. Here, the drug amount per minute is 1 mg/min, and the solution concentration is 0.2 mg/mL. So the volume delivered per minute is 1 mg/min divided by 0.2 mg/mL, which is (1 ÷ 0.2) mL/min = 5 mL/min. In other words, delivering 5 mL each minute provides 1 mg of drug at that concentration.

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