The chemical shifts of several protons in the NMR of hydroxyl tropolone are degenerate, as shown by the following data: delta_ 7.23 7.35 6.99 7.35, 7.23 Explain this apparent accidental isochrony in chemical shift values.

Write the missing chemical formula or name for each of the following substances listed in the procedure.

I'm taking a practice test and I'm having some trouble and was hoping you could help.  This is not graded I just need help See attached:

Dr. X claims that she has found a new remedy (carrot extract) to cure acne. She scores an interview with the science writer for a local newspaper, and gets a brief article written about her and her claims in that newspaper. The article does not contain any experimental evidence, but mentions that Dr. X accidentally splashed some carrot extract on her face and found that the acne was reduced a few days later. Student Y finds the article and cites it as a source for a paper he is writing for class, as evidence that acne has been cured. (a) Is this finding a fact, a theory, a hypothesis, or an observation? Explain why you think so. (b) Was it OK for Student Y to use the newspaper article as evidence for his paper? Explain why or why not.