Molecular mass applies to covalent compounds, representing the sum of atomic masses in a molecule, while formula unit mass applies to ionic compounds, representing the sum of atomic masses in a formula unit.
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Molecular mass applies to covalent compounds, representing the sum of atomic masses in a molecule, while formula unit mass applies to ionic compounds, representing the sum of atomic masses in a formula unit.
Molecular mass refers to the mass of a molecule, calculated by summing the atomic masses of its constituent atoms. Formula unit mass applies to ionic compounds and represents the mass of one formula unit, comprising the combined atomic masses of its ions.