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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
  • D
    63u
✓

Answer

  1. 63u

Explanation:

Molecular mass of nitric acid (HNO3​)  = (1 × atomic mass of H) + (1 × atomic mass of N) + (3 × atomic mass of O)

= 1 × (1u) + 1 × (14u) + 3 × (16u)

= 63u

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