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Answer to Question #43976 in 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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Density of menthol is 0.89 g/cm[sup]3[/sup] , hence the volume of 20 g of menthol is 20 g/(0.89 g/cm[sup]3[/sup])=22.47 cm[sup]3[/sup]. 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 cm[sup]3[/sup]. The volume of the solution will be V(solution)=V(menthol)+V(water)==22.47 cm[sup]3[/sup]+1980 cm[sup]3[/sup]=2002.47 cm[sup]3[/sup].
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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