This post covers how to get a blog label / tag (category) into feedburner (or even how to determine what it actually is). If you need to know how to style your RSS Feed or repackage it for a HTML only page, you’ll want to check out
If you’re trying to get your blog into a Facebook page, there are a couple of different options, which I will cover later. Unfortunately some of the apps/tools in Facebook for pulling in feeds do not seem to work as well with the label feed, but I’m testing some ideas.

PART 1 — HOW TO GET YOUR BLOGGER FEED FOR A LABEL / TAG (CATEGORY)
First click on a tag/label to get your url for that category (you do not need to be logged into blogger).
This is my link for my tag, my art
http://contentdivergent.blogspot.com/search/label/my%20art

The RSS for that category is:
http://contentdivergent.blogspot.com/feeds/posts/default/-/my%20art

In other words, you will find the URL for your tag in blogger and then replace search/label/ with
feeds/posts/default/~/

Doublecheck before you try to use it; either through editing in the address bar. You should see something that looks like this (this is firefox)

Success! — at least in terms of getting your RSS for a category in blogger.
If that is all you needed, you are done.