Sat Ii Chemistry

<p>I bought two books--Barrons and McGraw Hill's.
I took a practice test in both. Barron's got me 650-680; McGraw Hill got me 790. Which one is more reliable?!</p>

<p>Also, collegeboard website says that the test has 85 questions, but these books only have 70. did the test change this year?</p>

<p>barrons is usually harder than the actual test</p>

<p>yeah, but A LOT harder?</p>