Have made this a multiple (2) response poll
I don't think that Rhonda was destroyed by the elixir, just killed effectively. I wonder if others have theories on this. Feel free to post if you feel other. ;)

Good Question!
i think one of two things
a. yes she is completely gone for some unexplained reason.
b. someone has mastered the demon copy

i am with u on this one she could be still existing somewhere out their but michal hasnt found her yer or shes in hell but the king hasnt told emma yet or dosen't want to

but she exploded! so what you're suggesting is her soul is somewhere in hell, or a platform or in the ether somewhere?

yeah, basically. I know she is dead, but there seems to be a distinction between Human/ Immortal death and Demon death. Maybe I should have been a bit clearer about that in my question, I really hope that the destruction of demons (where they cease to exist at all) is not Rhonda's fate, that her soul exists atleast.

she sitl could exist but we dont know that she stil could be living as she was caus she could have bin returned to earth