A 1.8 mL cartridge contains how many milligrams of epinephrine when the solution is 3%?

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Multiple Choice

A 1.8 mL cartridge contains how many milligrams of epinephrine when the solution is 3%?

Explanation:
Understanding this question hinges on converting percent strength to milligrams per milliliter and then applying the cartridge volume. A 3% solution means 3 g of epinephrine in 100 mL. Converting to mg per mL: 3 g equals 3000 mg, so 3000 mg in 100 mL is 30 mg per mL. With a 1.8 mL cartridge, multiply 30 mg/mL by 1.8 mL to get 54 mg of epinephrine in the cartridge. So the cartridge contains 54 mg.

Understanding this question hinges on converting percent strength to milligrams per milliliter and then applying the cartridge volume.

A 3% solution means 3 g of epinephrine in 100 mL. Converting to mg per mL: 3 g equals 3000 mg, so 3000 mg in 100 mL is 30 mg per mL. With a 1.8 mL cartridge, multiply 30 mg/mL by 1.8 mL to get 54 mg of epinephrine in the cartridge.

So the cartridge contains 54 mg.

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