Chemistry
Determine the formula of the organic compound if its molecule contains 12 atoms of carbon. The percentage compositions of hydrogen and oxygen are 6.48 and 51.42 respectively.
Mole Concept
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Answer
| Element | % composition | At. wt. | Relative no. of atoms | Simplest ratio |
|---|---|---|---|---|
| Oxygen | 51.42 | 16 | = 3.21 | = 1 |
| Hydrogen | 6.48 | 1 | = 6.48 | = 2 |
| Carbon | 42.1 | 12 | = 3.50 | = 1 |
Simplest ratio of whole numbers = O : H : C = 1 : 2 : 1
Hence, empirical formula is CH2O
Since the compound has 12 atoms of carbon, so the formula is C12H24O12.
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