Are my safari and chrome passwords synced?
No - the browsers can try and grab a one time dump of settings, but you'll need a third party tool to either store/inject the password from a unified database or sync the results.

Best suggestion I have is to invest in 1Password, which syncs thru multiple methods and has extensions for Safari, Chrome and Firefox. 

The data also syncs to iOS devices Manual import of various settings when you open a browser repeatedly is a pain.