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Normal saline, isotonic with the fluid inside blood cells, contains what mass/volume percentage of NaCl?
A9.0%
B0.09%
C0.9%
D1.9%
Answer & Solution
Correct answer: C. 0.9%
A 0.9 percent (mass/volume) NaCl solution matches the osmotic pressure of blood cell fluid and is safe to inject.
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