Here are some other sites that offer reasonably comprehensive coverage of General Chemistry in an on-line or Web format.
An Introduction to Chemistry - an online version of a text by Mark Bishop of Monterey Peninsula College (CA). It is intended primarily for students in beginning chemistry courses. ($20 "donate-ware", and well worth it!)
Merlin's Principles of Alchemy is a chemistry hypertextbook in the form of a large set of HTML files that users download and then view with their Web browsers off-line. It is organized in an interesting way, and is intended to support users having a wide range of backgrounds and capabilities, including home-schoolers and adult learners. There is a nominal charge for downloading the material.
Virtual textbooks save trees!