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Empirical Formula

The empirical formula of a compound is the simplest form of the ratio of the atoms of
different elements in it. The molecular formula tells the actual number of each kind of atom
in a molecule of the substance.

Example (1)

An 18.3g sample of a hydrated component…

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Example (3)

Ammonium carbonate contains 15.38% of carbon, 7.69% of hydrogen, 35.9 % of nitrogen
and 41.03% of oxygen by mass.Use the data to confirm that the empirical formula of
ammonium carbonate is CH6N2O2.


Mass (g)
15.38 7.69 35.9 41.03

Molar Mass
12 1 14 16…


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