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The molecular mass of ${HNO}_{3}$ is_____.

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62 u

63 u

64 u

65 u

answer is B.

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Detailed Solution

${HNO}_{3}$ is the molecular formula of Hydrogen nitrate.
The molecular mass of Hydrogen nitrate
$= t h e a t o m i c m a s s o f H + t h e a t o m i c m a s s o f N + 3 \times t h e a t o m i c m a s s o f O$
$=$ $1 + 14 + 48 = 63 u$

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