Formula mass is the sum of the average atomic masses of all atoms represented in the chemical formula of a substance. It is typically expressed in atomic mass units (amu).
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Formula mass is calculated using the periodic table to find the atomic masses of each element in a compound.
The formula mass is used for ionic compounds, while molecular mass refers to covalent compounds.
To calculate formula mass, multiply the atomic mass of each element by the number of atoms of that element in the formula and then sum these values.
Formula mass helps in converting moles to grams and vice versa using molar mass.
It is essential for determining empirical formulas from experimental data.