Question

Which of the following molecule have three vibrational modes ​

Answer 1

Answer:

The three vibrational modes of the water molecule and their fundamental frequencies in liquid water: symmetric stretching (v1), bending (v2) and asymmetric stretching (v3). ... Peaks in the absorption spectrum correspond to the fundamental frequencies and higher harmonics of the vibrations of the water molecules.

Answer 2

Answer:

first CO2 second H2O third O2