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Date: 1-4-2019
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Date: 21-5-2019
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Date: 17-2-2016
1162
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Empirical formulas give the relative numbers of the different elements in a sample of a compound, expressed in the smallest possible integers. The term empirical refers to the fact that formulas of this kind are determined experimentally; such formulas are also commonly referred to as empirical formulas.
Example : Empirical formula from molecular formula
Glucose (the "fuel" your body runs on) is composed of molecular units having the formula C6H12O6. What is the empirical formula of glucose?
SOLUTION
The glucose molecule contains twice as many atoms of hydrogen as carbons or oxygens, so we divide through by 6 to get CH2O.
Note: this empirical formula, which applies to all 6-carbon sugars, indicates that these compounds are "composed" of carbon and water, which explains why sugars are known as carbohydrates.
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