The correct answer is: 109.5°, 120°, 109.5°. In the Lewis structure of acetic acid, the central carbon atom is bonded to two hydrogen atoms and one oxygen atom, and the oxygen atom is bonded to two hydrogen atoms.
The bond angles around the central carbon atom and oxygen atom should be approximately 109.5°, as these atoms are surrounded by four electron pairs in a tetrahedral arrangement. The bond angle around the central carbon atom will be slightly less than 109.5° due to the presence of the double bond to the oxygen atom, which introduces some degree of angle strain. The bond angle around the oxygen atom will also be slightly less than 109.5° due to the presence of the two hydrogen atoms, which are slightly larger than the electrons and will push the bond angles outward.
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