Final answer:
To find the total amount of 4% prilocaine in 3 cartridges, multiply the amount of prilocaine in one cartridge (72 mg) by 3, which equals 216 mg.
Step-by-step explanation:
Calculating the amount of local anesthetic in cartridges involves working with percentages and volumes. Given a 4% solution of prilocaine, this means that there are 4 grams of prilocaine per 100 milliliters of solution. To find the total amount of local anesthetic in 3 cartridges, we first need to know the volume of one cartridge:
Suppose one dental cartridge contains 1.8 mL of solution. The amount of prilocaine per cartridge can be found by multiplying the concentration (0.04) by the volume in milliliters:
Amount per cartridge = 0.04 × 1.8 mL = 0.072 grams or 72 mg
To find the total amount in 3 cartridges, multiply the amount per cartridge by 3:
Total amount = 72 mg/cartridge × 3 cartridges = 216 mg