Here's why:
* Schwa sound: The schwa sound is represented by the symbol /ə/ and is a very common, short, and unstressed vowel sound. It's often described as the "uh" sound in words like "about," "sofa," and "again."
* Nice: The vowel sound in "nice" is /aɪ/, which is a diphthong (a combination of two vowel sounds). It sounds like the "i" in "bite" or "like."
Therefore, the word "nice" does not contain a schwa sound.