Why is formula mass?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Formula mass exists to quantify the mass of one formula unit of an ionic compound. It's calculated by summing the atomic masses of all atoms in the chemical formula. For example, NaCl has a formula mass of about 58.5 amu (Na = 23 + Cl = 35.5). This helps chemists perform stoichiometric calculations and understand compound composition.
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