The infrared spectrum of CH3CH2NH2 shows two absorptions not shown by bromoethane. Identify the bonds responsible for these absorptions.

I'm a spectroscopist, but not a chemist. Here's my best guess.

The CH3CH2NH2 has a NH2 group where a Br would be in bromoethane. The NH2 is probably connected to the C2H5 with a C-N bond. There would also be a N-H stretch bond showing up in the IR spectrum.

:D thank you

right on!