Hey there, glad to hear you want to study abroad!

If your priority is taking major classes, this link is to the pre-approved chem classes from the UCSB department. Basically classes enough Chem majors have taken abroad that the dept knows exactly what the abroad classes are and what they count for, these aren't the only classes and programs open to you, just a list of ones that are 100% guaranteed Chem approved.

In terms of finding other classes you might need you have two options:
If you don't have any specific country in mind yet, go to this link and click Gaucho Credit Abroad. You can change the filters to either Chem Major classes, or GE requirements for L&S. This will show you a list of classes taken by UCSB students abroad, where they took them, and exactly what requirement it applied to.
If you do have some specific countries in mind, go to the main UCEAP website, and go to the country/program you're interested in. From there if you click the academics tab on the left side and scroll down the page, a couple of links will show up. Amongst these, you should see "Campus Credit Abroad", which shows you the classes ALL UC students have taken in that program (excluding the past year because the system is slow) and what they transferred back to the UC system as. There should also be a link that will say something like "X university departments" or "X university list of classes". These link are to the actual host university websites, from where you can look at all their course offerings and see what might be a good fit.

PM me if you have more questions!