To preview image: Click HERE Which of the 3D-sawhorse structures listed below corresponds to the provided Newman projection, when looking in the direction of the arrow?  

Question 11 (23 points total) Analysis of IR spectra. Part A (6 points) Assign BOTH IR spectra (Spectrum 1 and Spectrum 2) below to TWO of the FOUR provided structures A – D. TWO of the four structures do NOT match to the provided spectra at all. Part B (17 points) Identify the peaks that are associated with specific bonds of the structure and list the corresponding functional group that the specific bonds belong to. Re-create the example table below that organizes this information.  When assigning peaks, use the wavenumbers that are already labeled on the spectra. However, be aware that not all peaks that are labeled with wavenumbers can be assigned.    Example table (EACH spectrum needs to have a table): wavenumber (cm-1) Corresponding Bond Type Corresponding Functional Group 2978 C(sp3)-H alkyl 3300 N-H amine Entries in the example table above are for illustrative purposes only and are not based on either Spectrum 1 or Spectrum 2. Make your own versions of this table that follow this format but with entries that correspond to Spectrum 1 and Spectrum 2.   To preview the image for structures A -D: Click HERE Structures A – D:   Spectrum 1 To preview image for Spectrum 1: Click HERE Spectrum 2 To preview image for Spectrum 2: Click HERE   IR Correlation Chart To preview image of IR Correlation Chart: Click HERE  

Question 12 (26 total points). For 3-ethyl-2-methylpentane (line-angle structure provided below): part A (13 points) Draw Newman projections AND 3-D sawhorse structures corresponding to the lowest AND highest energy conformations for rotation around the C2-C3 bond. Draw the Newmans looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in “front”). Draw each 3D-sawhorse structure from the perspective of viewing the corresponding Newman projection FROM THE RIGHT. Clearly label which Newman/Sawhorse corresponds to the lowest energy conformation and which corresponds to the highest energy conformation.  part B (13 points) Determine the ENERGY DIFFERENCE between these conformations (use the data in either the table below or in the table on the cover page of this test). Be sure to clearly identify each energy contribution, listing both the relevant individual interactions and the corresponding interaction energies (for both conformations), that you take into account when answering this question. To preview image of the line-angle structure of 3-ethyl-2-methylpentane: Click HERE To preview image of the interaction energies table: Click HERE      

Talk about one new rehabilitation technology you learned about from the videos this week. What did you learn about it, and how does it help people with disabilities? Your answer must be at least 5 complete sentences. Make sure you name the technology, explain what it does, and describe how it can help a person with a disability in daily life.

An Android user reports that an app crashes every time it is opened. What is the technician’s first troubleshooting step?

A technician is configuring a customer’s home router and wants to restrict access to only authorized wireless devices. Which setting should be enabled?

Which of the following is a secure way to protect print jobs in a corporate environment?

Which mobile OS feature allows users to zoom in on a screen using two fingers?

A technician is helping a user enable fingerprint authentication on an Android phone. Which security setting is the technician configuring?

Why is mixing contrast media with other drugs in the same intravenous (IV) line not recommended?