What is the Formula of Unit Mass

The mass of the formula unit of a substance is the sum of the atomic masses of all atoms in an ionic compound’s formula unit.

A formula unit in chemistry is the analytical formula used as a separate body for stoichiometric measurements of any ionic or covalent network solid compound. It is the lowest ratio of ions represented in an ionic compound in total number.

The trick to measuring an ionic compound’s formula mass is to accurately count each atom in the formula and multiply its atoms’ atomic masses accordingly. Determine the formula mass for each ionic compound by using the atomic masses (rounded to two decimal places).

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