A vial contains 2 mg/mL; you draw 0.5 mL. How many milligrams are delivered?

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Multiple Choice

A vial contains 2 mg/mL; you draw 0.5 mL. How many milligrams are delivered?

Explanation:
The amount delivered is found by multiplying the concentration by the drawn volume: 2 mg/mL × 0.5 mL = 1 mg. Here, the mg per mL unit times the mL volume gives milligrams, so half a milliliter at 2 mg/mL yields 1 mg. The other options would require different volumes at the same concentration (e.g., 0.25 mL would give 0.5 mg; 1 mL would give 2 mg; 2 mL would give 4 mg).

The amount delivered is found by multiplying the concentration by the drawn volume: 2 mg/mL × 0.5 mL = 1 mg. Here, the mg per mL unit times the mL volume gives milligrams, so half a milliliter at 2 mg/mL yields 1 mg. The other options would require different volumes at the same concentration (e.g., 0.25 mL would give 0.5 mg; 1 mL would give 2 mg; 2 mL would give 4 mg).

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