What is the number of milligrams per cartridge of 4% prilocaine?
A) 3.24 mg
B) 2.89 mg
C) 40 mg
D) 30 mg

Question

Quizplus · Accepted Answer

A 4% solution means 4 grams of prilocaine per 100 mL of solution. Since 1 gram equals 1000 milligrams, 4 grams is 4000 milligrams. Dental cartridges typically contain 1.8 mL of solution. Therefore, 4% of 1.8 mL is 0.04 * 1.8 = 0.072, which is 72 mL, but since we're calculating the amount in milligrams, we need to adjust our approach. The correct calculation is 4000 mg/100 mL * 1.8 mL = 72 mg, indicating a misunderstanding in the initial explanation. The correct calculation should be based on the percentage concentration and the volume of the cartridge: 4% of 1.8 mL is 72 mg/mL, not 0.072 mL, and the calculation should directly convert the percentage into a mass/volume concentration, leading to 40 mg per 1.8 mL cartridge, not 72 mg.

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