Good for you! I BET you are stressed out, you are working a LOT!

I think your chem teacher's idea of rewriting the questions that way is great, because you get to LEARN from it. I never took chem - math marks weren't good enough - but maybe this will help:

The human brain memorizes in groups of 7, hence the 7 digits in phone numbers (in North America anyway).

So - take all the new terms and words in Chem and make yourself a dictionary. In the one science I took it was largely all the new words that stumped me. So, as you come along new words and terms, put them in your 'dictionary' and write a 7 word definition of it.

I'm sure you could go to your prof with your rewritten test and see if there is a pattern - that way, you can focus on one area of how you learn it instead of panicking in anticipation of the next test.

Just a thought.

You go, girl!