Empirical and Molecular Formulas:
The empirical formula is a formula for
substance which indicates the relative number of atoms of each element in the
substance. (Empirical formula is lowest ratio of atoms in
molecule)
A molecular formula is a formula for
substance which indicates the actual number of atoms of each element in a
molecule of the substance.
Examples:
Substance |
Empirical
Formula |
Molecular
Formula |
ethylene |
CH2 |
C2H4 |
benzene |
CH |
C6H6 |
ammonia |
NH3 |
NH3 |
The molecular
formula is a whole number multiple (1, 2, 3, 4, etc.) of the empirical
formula.
Empirical
Formula
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