The diagram below shows a simplified version of a fractionating column used in the petroleum industry. 
The position marked ___ corresponds to the cracker where large molecules are broken into smaller molecules.
Definitions:
Products
The results or outcomes derived from various processes, including chemical reactions.
N-ethyl-1-butanamine
A chemical compound belonging to the aliphatic amines, characterized by an ethyl group attached to the nitrogen atom of 1-butanamine.
Structure
In chemistry, it refers to the arrangement of atoms within a molecule, which determines its physical and chemical properties.
Compound
A compound created when multiple elements are chemically joined in a specific proportion.
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