[Green-Tea]

here is the diagram: http://en.wikipedia.org/wiki/File:L-Ascorbic_acid.svg

I know the molecule is covalent and the C/O bonds are covalent but are the bonds with H hydrogen bonds??
And as far as functional groups all I know is that it contains alcohol and is a lactone but I'm confused if there are any other functional groups I'm not seeing..we didn't learn much about these in class yet :/

[Schrödinger]

Well, i think you missed out enol (though they are just hydroxyl groups, they is different from alcohols you know)

[nikium]

Well, i think you missed out enol (though they are just hydroxyl groups, they is different from alcohols you know)

I believe that would be an enediol.

[nikium]

Maybe this is redundant since you mentioned lactone, but lactones are cyclic esters.