We're still in private beta, while the site should have gone public seven days after launch if everything went well. So we're not ready yet to leave the private beta, our very low number of questions is the primary problem.
I compared the number of questions we have so far (65) with the data I have easily available (Skeptics and Biology), and we're very far behind those two sites in question volume for the first week. Those two sites had around double the number of questions we have so far, and we had slightly longer than a week time.
So, what's stopping you from asking more questions? Why don't we already have enough questions to leave the private beta?
We need to demonstrate that we have enough experts collected here to start a good chemistry site, and for that we need to ask more high-quality questions and get some good answers for them.