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Animallover100
19.09.2019 •
Mathematics
To reduce 16 ounces of a 18% saline solution to a 10% solution, how much distilled water (to the nearest tenth oz.) should a nurse add?
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Ответ:
Saline solution: 18%
Pure water: 0%
Final solution: 10%
The volume of each solution is:
Saline solution: 16 oz
Pure water: w
Final solution: 16 + w oz
The moles of a substance are equal to the product of the concentration and volume. Therefore:
16*0.18 + w*0 = (16 + w)*0.1
w = 12.8 ounces
The volume of distilled water that must be added is 12.8 ounces.
Ответ:
4 (3c^2 -5d^2)
Step-by-step explanation:
i got