Where can I find an answer key for the 1999 AP Chemistry Multiple Choice exam?

I've really been trying to solve some of the problems but for hours I've been struggling and I can't seem to find any solutions of how to do some of the questions. I have tried looking on the collegeboard but all I can find are the scoring guidelines for the free response.

If not can anyone help me solve this question:
__Fe(OH)2 + __O2 + __H2O ---> __Fe(OH)3
If 1 mole of O2 oxidizes Fe(OH)2 according to the reaction represented above, how many moles of Fe(OH)3 can be formed?
I'm guessing 4 moles but I'm not really sure... can anyone provide an explanation to the correct answer?

Thank you so much for all of your help!