Using the VSEPR model, predict which molecules have bond angles of about 120°.

Question

Quizplus · Accepted Answer

Molecules with a trigonal planar geometry have bond angles of about 120°. 
I) BF3 has a trigonal planar geometry and bond angles of 120°.
II) CO32- has a trigonal planar geometry and bond angles of 120°. 
III) SO2 has a bent or V-shaped geometry with bond angles of about 119°. 
IV) CH2O has a trigonal planar geometry and bond angles of 120°. 
V) NH3 has a trigonal pyramidal geometry with bond angles of about 107°. Therefore, only molecules I, II and III have bond angles of about 120°. Choice B consists of these molecules.

Using the VSEPR Model, Predict Which Molecules Have Bond Angles