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Elements and Compounds

How many oxygen atoms are in a molecule of calcium carbonate (CaCO3)?

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December 25, 2014 7:06AM

A mole of H2 molecules contains 6.023 x 10^(23) H2 molecules or 2 moles of H atoms (since each molecules has 2 atoms). A mole of CaCO3 (calcium carbonate) has one mole (Avogadro number) of Ca atoms, one mole of C atoms and 3 moles of O atoms.