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Molecular Mass

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Question

Calculate the molecular mass of Nitric acid ( ${H N O}_{3}$ ).

A

60

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B

61

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C

62

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D

63

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Solution

The correct option is D 63
molecular mass of ${H N O}_{3}$ = mass of H atom + mass of nitrogen atom + 3 x mass of oxygen atom
$= 1 + 14 + 48 = 63 u$

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