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Ask an Expert - Online Chemistry Help
Find professionals and teachers who answer your chemistry questions. These include science journalists and members of museums and laboratories. Many 'experts' maintain online archives of answered questions.
Chemistry Forum - Discussion
If you have homework questions, this is a great place to go to get answers. If you have chemistry knowledge and want to share it with others, this is the place for you, too!
Best of the About Chemistry Forum
About Chemistry's Forum hosts some interesting and educational discussions. This is a collection of some of the best threads.
Ask MRScience
Answers to questions of a physical chemistry nature. From the University of Florida.
Chem101
Input keywords to find topics on their site.
ChemOnline
Post questions, read responses to others.
How Stuff Works
Ask a question of Marshall Brain or search his archives.
Just Ask Antoine
Antoine answers general chemistry questions. In addition to answering new questions, browse the previous questions/answers, exam guide, glossary, notes, resources section, slide index, and tutorial index.
KnowWhat.com
Readers' scientific questions answered by Susan Brown.
New Scientist
Answer a question or ask your own in their Last Word section.
SCORE's Ask a Scientist
This is a K-12 site for all areas of science. In addition to questions and answers there are links to other sites. The site is sponsored by Schools of California On-line Resources for Education (SCORE).