How many grams of drug are found in 80ml of a 35% solution?

To determine how many grams of drug are in 80 ml of a 35% solution, you can use the formula for the concentration of solutions. A 35% solution means that there are 35 grams of drug in every 100 ml of solution.

To find out how many grams are in 80 ml, you can set up a simple proportion based on the known concentration:

1. First, find the amount of drug per milliliter. Since there are 35 grams in 100 ml, you can calculate the amount in 1 ml:

35 grams / 100 ml = 0.35 grams/ml.

2. Next, multiply the grams per milliliter by the total volume of the solution (80 ml):

0.35 grams/ml × 80 ml = 28 grams.

This calculation shows that in 80 ml of a 35% solution, there are indeed 28 grams of the drug present. This is why the correct answer is 28 grams.