What is the total amount of drug in grams in 100ml of a 5% solution?

To find the total amount of drug in grams in a 100 ml solution that has a concentration of 5%, you start by understanding what the percentage represents. A 5% solution means that there are 5 grams of the active ingredient in 100 ml of the solution.

Calculating this is straightforward: since the percentage is given as grams per 100 ml, you directly apply that to your volume. So, in 100 ml of a 5% solution, you will have:

[ \text{Amount of drug} = \text{Concentration} \times \text{Volume} ]

Plugging in the values:

[ \text{Amount of drug} = 5 , \text{g} ]

This leads to the conclusion that there are 5 grams of the drug in 100 ml of a 5% solution, making this answer the most accurate and appropriate.