un - con - scious
There are many reasons to learn how to divide unconscious into syllables. Separating a word like unconscious into syllables is mainly to make it easier to read and pronounce. The syllable is the smallest sound unit in a word, and the separation of the unconscious into syllables allows speakers to better segment and emphasize each sound unit.
Knowing how to separate unconscious into syllables can be especially useful for those learning to read and write, because it helps them understand and pronounce unconscious more accurately. Furthermore, separating unconscious into syllables can also be useful in teaching grammar and spelling, as it allows students to more easily understand and apply the rules of accentuation and syllable division.
In the case of the word unconscious, we find that when separating into syllables the resulting number of syllables is 3. With this in mind, it's much easier to learn how to pronounce unconscious, as we can focus on perfecting the syllabic pronunciation before trying to pronounce unconscious in full or within a sentence. Likewise, this breakdown of unconscious into syllables makes it easier for us to remember how to write it.