Question:
what is formula mass?
Answer:
The formula mass of a molecule is defines as the sum of the atomic weights of the atoms in the emperical formula of the compound. Its unit is atomic mass unit or amu.
For example, 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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