If a drug has a concentration of 425 mg per 25 mL, how many milliliters are needed to deliver 10 grams of the drug?

Answer 1

1. You must obtain the same units for cancellation purposes:

1. 425 mg per 25 mL = 425 mg/25 mL
2. Convert this number into grams per mL:
3. 425 mg/25 mL * (1 gram/1000 mg) = 0.425 grams/25 mL

2. Then use your starting amount of drug to convert to milliliters while cancelling units:

1. 10 grams of drug * (25 mL/0.425 grams) = 588.24 mL (rounded to two decimal places)