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Recognised as Chemical formula

CaCO3

  • Calcium carbonate
  • Formula
  • 100.086 g/mol
  • 5 atoms

CaCO3 is calcium carbonate. It has a molar mass of 100.086 g/mol, made up of 5 atoms across 3 elements: 1 × Ca, 1 × C, 3 × O.

Molar mass

Molar mass100.086 g/mol
Total atoms per molecule5
Distinct elements3
Mass of one molecule1.6619671 × 10^-22 g
Molecules per gram6.0169662 × 10^21

Name

NameCalcium carbonate
SourceNerdulator compound names, September 2026. Systematic names follow the IUPAC Red Book (2005) and Blue Book (2013)

Composition by mass

Ca40%
C12%
O48%
Calcium (Ca)40.078 g/mol, 40.044%
Carbon (C)12.011 g/mol, 12.001%
Oxygen (O × 3)47.997 g/mol, 47.956%

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