difference between molecular mass and formula unit mass
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The formula mass (formula weight) of a molecule is the sum of the atomicweights of the atoms in its empiricalformula. The molecular mass(molecular weight) of a molecule is its average mass as calculated by adding together the atomic weights of the atoms in the molecular formula.
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Molecular mass is used for molecule i.e. covalently-bonded multi atomic substances.
Formula unit mass are used to describe ionic compounds . i .e. ionically bonded compounds found as lattice structures.
Formula unit mass are used to describe ionic compounds . i .e. ionically bonded compounds found as lattice structures.
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