What is the schwa vowel sound in dollar?

The schwa vowel sound in "dollar" is in the first syllable, "dol". It's the short, unstressed sound represented by the symbol ə.

Here's how it breaks down:

* dol - /ˈdɑː.lər/ - The schwa sound is the short, unstressed "uh" sound.

* lar - /ˈdɑː.lər/ - This syllable is stressed, so it has a clearer vowel sound, the long "a" sound.