Chemistry 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

ratio

           1                   :                               1                        :                  3

Empirical Formula= CaCO3