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Carboxylic acid - Wikipedia
Definition of Carboxyl Group in Chemistry - ThoughtCo
Carboxyl Group - Formula, Structure, Properties & Sources
Carboxyl Group - Definition and Quiz - Biology Dictionary
Carboxyl Functional Group - ChemTalk
Carboxyl Group - Biology Simple
Carboxyl Group - Examples, Formula, Nomenclature, Structure
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Carboxyl Group: Definition And Function - Science Trends
21.1: Structure and Properties of Carboxylic Acids and their Salts