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Answer to Question #43976 in Other Math for bobbi

Question #43976
You receive an order for a dose of Bactrim injection 25 mL. You have on hand Bactrim 16mg/mL. How many milligrams are contained in the 25 mL dose?
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Assignment Expert
12.08.15, 11:29

Density of menthol is 0.89 g/cm3 , hence the volume of 20 g  of menthol is 20 g/(0.89 g/cm3)=22.47 cm3. If 20 g ofmenthol become 1% of the solution, then the solution will weigh 20 g/1*100=2000 g and mass of waterwill be (2000-20) g=1980 g, the volume ofwater will be 1980 mL=1980 cm3. The volume of the solution will be V(solution)=V(menthol)+V(water)==22.47 cm3+1980 cm3=2002.47 cm3.

12.08.15, 02:03

8. The pharmacist has asked you to weigh out 20 grams of menthol and dissolve it in sterile water to make a 5% solution. Later you are asked to change the concentration to a 1% solution to fill an order that was just received.

What will the final volume of a 1% solution be?

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