What is meant by formula mass? Explain it elaborately.

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Solution

The formula mass of a molecule (also known as formula weight) is the sum of the atomic weights of the atoms in the empirical formula of the compound. Formula weight is given in atomic mass units (amu).
Example and Calculation
The molecular formula for glucose is C₆H₁₂O₆, so the empirical formula is CH₂O.

The formula mass of glucose is (12)+2(1)+16 = 30 amu.

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