What is the difference between molecular mass and formula mass?

Answer 1

The difference merely lies on the type of the compounds you are dealing with. Molecular mass should be used only to refer to molecular compounds or covalent compounds.

Formula mass is a more general term than molecular mass and can be used to refer to all compounds but not the molecular mass. It is defined as the sum of atomic masses of the ions present in the formula unit of an ionic compound, whereas molecular mass is the sum of the atomic masses of the atoms in a molecule.

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Answer 2

Cameron Andrews

Molecular mass refers to the mass of a single molecule of a substance, while formula mass refers to the mass of a formula unit of a compound. Molecular mass is applicable to covalent compounds, representing the sum of the atomic masses of all the atoms in a molecule. Formula mass is used for ionic compounds and represents the sum of the atomic masses of all the atoms in the compound's empirical formula.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.