I chose this site for affordable prices and excellent support. People come to us to get assistance with their academic tasks and get just that.
For example, you can ask a question on Twitter and may get a response (be sure to use the #chemistry hashtag for more visibility). Message them and see if they know the answer to your question.
Consider using social media to set up a study group if you have multiple questions.
Khan Academy is factual, but unlikely to help unless you're studying very basic chemistry.
If Google can't find help for your problem, your best bet is to call or message a classmate or instructor or find one of these resources in person.