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Nitric acid and water form a maximum boiling azeotrope at about what HNO3 mass percentage?
A32%
B95%
C68%
D50%
Answer & Solution
Correct answer: C. 68%
The nitric acid and water azeotrope is roughly 68 percent HNO3 and 32 percent water by mass, boiling at 393.5 K.
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