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Empirical and Molecular Formulas
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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