Sp12Exam1ANS - Chemistry 310N Dr. Brent Iverson 1st Midterm...

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Unformatted text preview: Chemistry 310N Dr. Brent Iverson 1st Midterm Feb. 16, 2012 NAME (Print): _____________________________ SIGNATURE: _____________________________ Please Note: This test may be a bit long, but there is a reason. I would like to give you a lot of little questions, so you can find ones you can answer and show me what you know, rather than just a few questions that may be testing the one thing you forgot. I recommend you look the exam over and answer the questions you are sure of first , then go back and try to figure out the rest. Also make sure to look at the point totals on the questions as a guide to help budget your time. Please print the first three letters of your last name in the three boxes You must have your answers written in PERMANENT ink if you want a regrade!!!! This means no test written in pencil or ERASABLE INK will be regraded. Please note: We routinely xerox a number of exams following initial grading to guard against receiving altered answers during the regrading process. FINALLY, DUE TO SOME UNFORTUNATE RECENT INCIDENCTS YOU ARE NOT ALLOWED TO INTERACT WITH YOUR CELL PHONE IN ANY WAY. IF YOU TOUCH YOUR CELL PHONE DURING THE EXAM YOU WILL GET A "0" NO MATTER WHAT YOU ARE DOING WITH THE PHONE. PUT IT AWAY AND LEAVE IT THERE!!! 14 13 12 11 10 9 8 7 (24) (20) (24) (21) (13) (13) (19) (14) (4) (12) (261) 6 Total T Score HW Total Grade (HW score + Exam Grade) % 5 (18) (16) 4 (19) 3 2 (24) 1 Page Points (20) 15 Honor Code The core values of the University of Texas at Austin are learning, discovery, freedom, leadership, individual opportunity, and responsibility. Each member of the University is expected to uphold these values through integrity, honesty, trust, fairness, and respect toward peers and community. (Your signature) Pg 1 _____________(24) 1. (4 points) What is the most important question in organic chemistry? Signature_________________________ 2. (14 points) 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. We wil be looking for a minumum of 7 key points here. The popular medical diagnostic technique of magnetic resonance imaging (MRI) is based on the same principles as NMR , namely the flipping (i.e. resonance) of nuclear spins of protons by radio frequency irradiation when a patient is placed in a strong magnetic field . Magnetic field gradients are used to gain imaging information, and rotation of the gradient around the center of the object gives imaging in an entire plane ( i.e. slice inside patient ) . In an MRI image, you are looking at individual slices that when stacked make up the three-dimensional image of relative amounts of protons , especially the protons from water and fat, in the different tissues ....
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This note was uploaded on 02/27/2012 for the course CH 310n taught by Professor Iverson during the Spring '08 term at University of Texas at Austin.

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Sp12Exam1ANS - Chemistry 310N Dr. Brent Iverson 1st Midterm...

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