Please help, thanks!

what exactly are the formulae these functional groups?

carboxylic
carboxylate
caboxyl
carbonyl

3 answers

somebody help.......?

carboxylic is -COOH?
then what's carboxyl and carboxylate???
RCOOH, where R stands for anything you wish (but USUALLY not H), is carboxylic acid.
Carboxyl is the ion; i.e., RCOO^- and it may be referred to as the carboxylate ion since the salt of RCOOH (for example, RCOONa) might be named sodium carboxylate.
ok thank you!