What to actually study for chem/world

<p>this has probably been asked but I can't seem to find an absolutely clear answer (maybe I'm looking in the wrong place, idk). BUT ANYWAYS. </p>

<p>I plan on taking both the world and chem SAT subject tests this May (right before the AP tests...like three days before). I also plan on studying like mad for both. I have Barron's 6th Ed. AP World and 5 Steps to a 5 (2015) for Chem. I have my schedule all planned out to read both cover to cover. I also will watch review videos, and go through the entirety of Brainscape's flashcards for each subject (if you haven't used these I highly recommend them; they're electronic flash cards that you can get on your phone and the app is structured very well.)
This is the same method that I used last year, and it helped me get a 5 in APUSH/Bio.
But here's my question: would this be ENOUGH preparation for the SAT subject tests as well? I know they're a little different.
I DO own Barron's SAT Subject Chem/World study books, but I don't want to waste my time with them if I don't absolutely need to. I will also be preparing for AP Calc and Lang, not to mention other extracurriculars and the actual SAT.
Do you think I should study extra for the SAT Subject tests? Or just keep only studying for the AP's?
Thanks!!! also happy holidays </p>

<p>I found barron’s chem really helpful</p>