Physical chem

Paper , Order, or Assignment Requirements

1-What makes molecule has uv-vis absorption? Explane

2- where is the uv-vis absorption for all peptides ? Why??

3- which three amino acids have special uv-vis absorption? What does the absorption look like ? Describ ?

4- what is spectroscopy and what is use for ?

5- why the methan C2H6 does not have uv-vis ?