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The formula which represents the simple ratio of atoms in a compound is called its :

  • A.Molecular formula
  • B.Structural formula
  • C.Rational formula
  • D.Empirical formula

Answer: D

The formula showing the simplest ratio of atoms is the empirical formula.

The empirical formula gives the smallest whole-number ratio of the atoms of each element in a compound. Glucose, for example, has the empirical formula CH2O, while its molecular formula is C6H12O6.

The molecular formula gives the actual number of each kind of atom in a molecule, a whole-number multiple of the empirical formula. A structural formula shows how the atoms are bonded. A rational (condensed) formula groups atoms by functional groups, such as CH3COOH for acetic acid.

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