Chemistry Empirical Formula

Chemistry C2 AQA

Empirical Formula

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Empirical Formula

Example: A compound contains 20g Ca, 6g C and 24g O calculate its empirical formula.

20g Ca                                             6g C                                       24g O

20/40 (formula mass of Ca)   6/12 (formula mass of C)  24/16 (formula mass of O)

mass of 1 mole

          0.5                                                0.5                                        1.5


           1                   :                               1                                         3

Empirical Formula= CaCO3

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