Empirical Formulas

• The difference between an Empirical Formula and a Molecular Formula, is that an Empirical Formula give the whole number ratio of elements in a compound, whereas a Molecular Formula give the actual numbers.
  

Empirical Formulas
Simplest Formulas

How do you find the Empirical Formulas?
Example:
A sample of an unknown compound is analyzed and found to contain 8.4 G of Carbon, 2.1 G of Hydrogen and 5.6 G of Oxygen.

*To fully understand an figure out what the Empirical Formulas are, think back to the chart we did in class. *



*If the ratio ends in a decimal of :
~ 0.5 multiply it be 2.
~0.33 or ~0.66 multiply it by 3.
~0.25 or 0.75 multiply it by 4.
~0.2, ~0.4, ~0.6, or ~0.8 multiply it by 5.