In an Infrared Spectroscopy graph, the y-axis is typically labeled \% transmittance. What does a peak on this sort of graph represent? The absorption of infrared light by a bond in the molecule The absorption of infrared light by nuclear spin in the atoms of the molecule The transmission of infrared light across a molecular fragment The transmission of infrared light through a bond in the molecule View hint for Question 1 Question 2 (1 point) Saved The units on the x-axis of an IR spectroscopy graph are typically wave numbers. What do the wave numbers represent? reciprocal centimeters the number of light waves being transmitted the quantum number of the electrons involved the frequency in hertz