so I've configured my torrc file to only use exit nodes in Russia. Now, I type in the URL of the website that I want to visit and the request is successful. Is there a configuration setting in the browser that will allow me to figure out the IP address of the exit node that was to process the request?
It can be viewed in the Tor Button display. Click the green onion button (next to the address/search bar) and you should see a panel at the side of the pull-down menu entitled "Tor circuit for this site", which shows the circuit that is in use for connecting to the site.
The last one on the list before "Internet" is the exit node in use for the connection.