Yes.
No, non carbonated drinks do not have carbon dioxide.
no. you cant take food or drinks on a plane. if you want something then you have to get in the plane and ask them for it.
Carbonated drinks give you gas and that would be painful with diverticulitis.
No
Carbonated water is widely used is in soft drinks.
Carbonated water is a more refreshing drink.
Carbonated drinks are absorbed faster into the body's systems. This fact is especially important to remember if you are drinking carbonated alcoholic drinks because you may become drunk faster.
Yes. You just can't bring food and drinks on the plane. Either one. I'm not an expert.
In the sense that nothing can be absolutely pure... maybe.In the sense that it's a significant and deliberately included ingredient, no. Some carbonated drinks do contain phosphoric acid, but most do not.The acid that all carbonated drinks do contain is carbonic acid, since that (or more precisely the carbonate ion that it contains) is where the name "carbonated drinks" comes from.
Yes, in carbonated drinks.
none