![]() Please let us know how we can improve this web app. Mass Percent: 40.043 Carbon Symbol: C Atomic Mass: 12.0107 of Atoms. Related: Molecular weights of amino acids Percent composition by element Calcium Symbol: Ca Atomic Mass: 40.078 of Atoms: 1. ![]() Weights of atoms and isotopes are from NIST article. Molar mass ( molar weight) is the mass of one mole of a substance and is expressed in g/mol.(1 u is equal to 1/12 the mass of one atom of carbon-12) Now we can take our answer from step (1), 0.02 moles of CaO, and multiply by the molar ratio. ![]()
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