Add Chemistry Exercises

This site has been great for helping me with Math, but I am now starting to move away from that and will be focusing on sciences. I have been very unsatisfied with the chemistry help on this site. The videos help somewhat, but I learn best by practicing examples of some kind just like I do with the math. Could you please look into expanding what you offer for chemistry help? I don't know where else I can practice chemistry and know if I am getting it right or wrong.