Final answer:
To prepare a 15% solution with 40mL volume, calculate the total milligrams of the drug needed, then divide by 250mg to find the number of capsules required.
Step-by-step explanation:
The question involves preparing a 15% solution using 250mg capsules and determining how many capsules are needed to create 40mL of this solution. First, we calculate the total amount of the drug needed for a 15% solution: 0.15 (concentration as a decimal) × 40mL (volume of the solution) × 1000mg/g (conversion from g to mg). This calculation yields the total milligrams needed. After finding the total required milligrams, we can then determine the number of capsules by dividing this number by the amount of medication in each capsule, which is 250mg.