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Atoms and Molecules — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceAtoms and Molecules1 Mark
MCQ
Molecular mass of nitric acid is:
  • A
    $22u$
  • B
    $12u$
  • C
    $33u$
  • ✓
    $63u$
✓

Answer

Correct option: D.
$63u$
Molecular mass of nitric acid $(HNO_3$​$) = (1 \times $ atomic mass of $H) + (1 \times $ atomic mass of $N) + (3 \times $ atomic mass of $O)$
$= 1 \times (1u) + 1 \times (14u) + 3 \times (16u)$
$= 63u$

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