<p>So I’m considering buying the non UCD version of the general chemistry textbook, and the seller says it’s the exact same but with a different cover. Is this true? I better not buy it and find out the problem sets are different or something. Also, can someone tell me the ISBN for the 10th edition of the non-UCD textbook? Thanks!</p>
<p>I’m also about to start chem 2a. Here’s my question. It looks like 2 of 3 of the textbook options include “Mastering Chem” (or at least the access code), which I see on the internet is a supplementary online study tutorial. Does the class actually use this? Is this add-on necessary?</p>
<p>My experience is that when you buy a used textbook, the access code has already been used and you have to buy it again, directly online. Often this costs $50-$100.</p>
<p>What does anyone say? Thanks.</p>