Homework 10: Gradescope Iverson CH320M/328M Due Monday Dec. 7

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For the Gradescope portion of both weekly homework and midterm exams, you will be required to write answers to all questions, either on paper or using an electronic tablet (e.g. an iPad) and upload them to the appropriate grade scope assignment. This is the Gradescope portion of your weekly homework. Half of this assignment is graded based on completion, while the other half of possible points will be assigned based on the accuracy of a problem(s) that we will randomly chose to grade for correctness each week. For this assignment, solve the problems on a separate sheet, and then only upload clearly labeled answers. Failure to clearly indicate the correct answer, providing multiple answers, mislabeling of problems, or not assigning problems to pages will result in the loss of points, so please, do this correctly! You must include your name, UT EID, and signature on each page you upload. After answering all questions on a blank sheet and properly numbering answers, upload your work under the appropriate assignment on Gradescope. After you upload, you must assign where each question is on the page(s) you uploaded so we can grade it. Note that assigning questions to specific pages in your upload does not affect your submission time: the assignment is turned in once you have uploaded the assignment and reached the Gradescope webpage below. This means you have no reason to not spend a minute or so and tell us where answers are within your submission pages. Failure to do this will result in losing points on the assignment. Note the blue arrow pointing out instructions.

In the picture below, you can see that questions 1-3 were assigned to page 1, and question 4 was assigned to page 2. You are required to assign all question numbers in the ‘Question Outline’ to the pages you uploaded, so that we always grade what you want us to grade for each question. If a question is answered on multiple pages, assign that question to all relevant pages!

Homework 10: Gradescope Iverson CH320M/328M Due Monday Dec. 7

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An example showing what a Gradescope submission could look like is below: • Name • UT EID • Signature • Properly numbered answers on a blank page, no need to copy the question

Name StudentMostudentpantsUT EID abol23_Signature StudentBestudentpantAssignmentiweekly.HN 1GradesuopePotI1 Where are the electrons

2A.tl3MfMhA2A 13 a

2B 4

I 3C.Nodipok.CI

4A CHgCHzCHCHCHz

gi qi5 fE µd

6A Tap cap GB Esp Hss

If you make a mistake, clearly erase/scribble it out and note what you want to be graded.

Feel free to box answers/add lines to clearly separate your answers

Homework 10: Gradescope Iverson CH320M/328M Due Monday Dec. 7

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Your final gradescope homework is only the two following questions that we are asking you to hand write and submit via Gradescope.

1. In no more than four sentences, explain what happens in a 1H NMR experiment.

The 1H NMR experiment is carried out by placing a sample in a strong magnetic field, then the sample is irradiated with electromagnetic radiation. When the energy of the electromagnetic radiation corresponds exactly to the difference in energy between the +1/2 and -1/2 nuclear spin states, the nuclei absorb the energy as the nuclear spins are excited (i.e. "flip" when they come into "resonance" with the electromagnetic radiation) from the lower energy spin state (+1/2) to the higher energy spin state (-1/2). The NMR spectrum is a plot of absorbance vs. frequency scaled for magnetic field strength, wherein chemical shift (distance from the TMS signal at 0 ppm) is correlated with the functional groups present, the connectivity of atoms in molecules can be determined by splitting, and the relative ratio of different equivalent H atoms in the molecule is proportional to the relative integrations of the different signals.

2. Suppose a relative of yours is having an MRI. In no more than four sentences, explain to them what is happening when they have the MRI scan. Please memorize this passage, the same one given to you in class.