Respuesta :

Answer:

The formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. The formula mass of a covalent compound is also called the molecular mass.

Explanation:

Answer:

Molecular mass

Explanation:

The molecular mass of a compound or substance can by computed when you sum  the atomic masses of the constituent atoms .

The best term that describe the sum of atomic masses is the Molecular mass.

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