I think theres some confusion here. Wordpress generates a RSS feed which is located at
www.yourdomain.com/feed or
www.yourdomain.com/wpinstallfolder/feed
If you wish to submit a xml sitemap to google, you can either use this
http://www.xml-sitemaps.com/
or get
http://www.arnebrachhold.de/2005/06/...rator-v2-final
which is a wordpress plugin that will automatically rebuild your sitemap and pings google.