Question

what is the nomenclature of C4H9OH

Answer 1

As the compound has 4 Carbon = prefix will be But

and it also has alcohol group = suffix will be OK

after numbering from functional group

it's IUPAC name will be

Butan-1-ol

Answer 2

1-butanol, which is also known as n-butanol or 1 butanol or butyl alcohol, (some times also called bio butand when produce biologically ) is an alcohol with a 4 carbon structure and the molecular formula of c4h100 , it is primarily used as solvent , as anintermediate in chemical synthesis and as a fuel.
plz mark this as brainlist.