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Atoms and Molecules — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceAtoms and Molecules1 Mark
MCQ
Formula unit mass of CaCO3​ is:
  • A
    104u
  • B
    106u
  • C
    100u
  • D
    1144u
✓

Answer

  1. 100u

Explanation:

Formula unit mass of CaCO3​ = Atomic mass of Ca + Atomic mass of C + (Atomic mass of O × 3)

= 40u + 12u + (16u × 3)

=100u

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