Carboxylic acids are derivatives of hydrocarbons in which one or more of the hydrogen atoms in the hydrocarbon have been replaced by a carboxyl group. Yes butanoic acid is a hydrocarbon.
Answer:34.55 explanation:number of neutrons=mass number-atomic number the mass number for copper is 63.55 so you do 63.55-29 (29 is the atomic number) and you would get 34.55
