Consider the ethylbenzoate where its acyl oxygen is radiolabled with the O-18 isotope.  Consider the the result of transesterification using a basic solution of methanol.  What percentage of the newly formed ester would carry the radiolabel O-18 isotope?

The synthesis path below produces one of the popular NSAIDs on the market today.  Choose the best option.

When using restraints, safety includes…

Jackie loves watching science fiction shows and writing fan fiction. She posts her most recent story online one evening. When she wakes up, she finds a comment from a reader saying that her plot was almost identical to an old episode of Doctor Who (a science fiction program that Jackie had watched all of the episodes of several years ago). Based upon this, what memory error had Jackie most likely experienced? 

Walking down the hall you hear Mr. Shapiro shouting.  When you enter his room you see smoke & flames coming from the electrical outlet.  The first thing you should do is….

Differences in the amplitude of light waves will be perceived as differences in _________. Differences in the amplitude of sound waves will be perceived as differences in _________.

Danica is the coach of a rowing team. She thinks that her rowers could try a bit harder than they are. As such, she installs a force gauge that allows her to monitor how hard each individual member of the team is rowing. She finds that her team improves by 10% after she installs the force gauges. The fact that Danica’s rowing team rowed harder when each of their individual efforts was being monitored as compared to when only the team performance was being monitored is most consistent with:

A sore caused by constant unrelieved pressure on the skin is a…

Consider the structure of Entacapone (Comtan), a component in a medication used to treat Parkinson’s disease, shown below and answer the following: a) What is the hybridization of the nitrogen atom labeled (a)? b) What is the hybridization of the carbon atom labeled (b)? c) What is the hybridization of the nitrogen atom labeled (c)? d) What is the formal charge of the nitrogen atom labeled (d)? e) How many proton signals are predicted to appear in the 1H NMR spectrum? f) Describe the 1H NMR splitting pattern at position (g).   g) Describe the 1H NMR splitting pattern at position (b). h) Describe the 1H NMR splitting pattern of the most upfield signal. i) Describe the splitting pattern for the vinyl 1H signal? j) If the CN group was replaced by a nitro group would the 1H signal at (h) move upfield or downfield? k) Which position shows or possesses the most acidic proton? l) Does this molecule possess an enantiomer? m) Does this molecule possess a diastereomer?

Generates a major organic product with the most downfield 1H NMR signal. 1) sec-butylbenzene treated with heated chromic acid 2) Complete acid hydrolysis of benzonitrile