is россии in the prepositional case here? I'm curious why an и has been placed on the end, rather than an e. I understood the normal rule was я -> е for prepositional case.
It’s an exception: when the stem ends in -и, prepositional case ends in -ии, not in -ие. E.g. в России, в Монго́лии 'in Mongolia', на Еврови́дении 'on Eurovision', etc.