Not sure if I need to write this, but to open a window for the brain-farts I know occur this early in the Skill Tree: the "t" at the end of a Definite Singular ett-word (e.g., djuret, huset, barnet) simply turns into an n to make the Definite Plural of this ett-word....................
Another wee tip: to get to grips with these crazy rules (at least it's not Polish, or Russian!), try looking at the word, and saying out loud (i.e. explain it to yourself) what the rule is that governs the Plural and Definite Plural of the word you see, when in said forms.
It is correct. /ɕœtː/ is the pronunciation given at wiktionary.
Check wikipedia for some clue about ɕ. http://en.wikipedia.org/wiki/Voiceless_alveolo-palatal_sibilant