Generally we do not want to give the impression that this site can give access to free personal researchers. We also want the quality of Q&A to: 1.) be of good quality 2.) show research effort and 3.) be useful to future visitors. I can't see any of your deleted without a tedious search but for example a question like "why do acids neutralize bases" might be useful but not quality and shows no research effort. If you ask about various databases or resources, these may be quality and researched but will change with time and not be useful to future visitors
If you have quick questions about source validity or recommendations feel free to ask in chat
I want to clarify this is not to say you can't/shouldn't ask information questions sometimes they get popular enough to make the hot network questions list but do think about how it can be asked in light of the objectives of the site.