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Using H as 1, N as 14 and O as 16, the molecular mass of nitric acid works out to:
A53 u
B73 u
C43 u
D63 u
Answer & Solution
Correct answer: D. 63 u
1. Nitric acid has one H, one N and three O atoms.
2. One plus fourteen plus forty eight is sixty three.
3. So the molecular mass is 63 u.
_Source: syllabus Science Class IX, Chapter 3, Atoms and Molecules._
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