No. Hence cannot be used to end sentences when it is used as a synonym for "therefore" (just like "therefore" cannot be used to end a sentence). If you want to use hence in that sentence, it has to be like this: He has done all the work required - hence, his mission is complete.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
NL888 Can "hence" be used in the ending of a sentence?No, sorry.