I was wondering if some of these feats work on a monk or not, like ambidexterity. The description says "weapons in both hands" but i would assume a monk would want to be ambidextrous in general, even though im not wearing weapons.
How can i tell if it works on a no weapon monk or not?
Monks and Feats?
Ask. 
Generally if the feat description says "weapon", it won't work for a monk using fists. Say no to Ambidexterity and Two-Weapon Fighting.
Good feats for a monk (if it has sufficient stats) are Power Attack, Cleave, Dodge, Expertise, Improved Critical, and the saving throw feats.
Optional feats are Dirty Fighting and Rapid Shot.
Skip Improved Initiative, the feat is broken and doesn't work. Also skip Deflect Arrows, as you'll get that feat for free, and Dash, since monks already get a level-based movement bonus.
Generally if the feat description says "weapon", it won't work for a monk using fists. Say no to Ambidexterity and Two-Weapon Fighting.
Good feats for a monk (if it has sufficient stats) are Power Attack, Cleave, Dodge, Expertise, Improved Critical, and the saving throw feats.
Optional feats are Dirty Fighting and Rapid Shot.
Skip Improved Initiative, the feat is broken and doesn't work. Also skip Deflect Arrows, as you'll get that feat for free, and Dash, since monks already get a level-based movement bonus.
When your back is against the wall... the other guy is in a whole lotta trouble.