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Tetramethylsilane is used as an internal standard for calibration in this technique’s “proton” and “carbon-13” variants. For 10 points each:
[10m] Name this spectroscopic technique in which signals are normalized to chemical shift values. This technique investigates the structure of molecules by applying a strong magnetic field before perturbing them.
ANSWER: NMR spectroscopy [or nuclear magnetic resonance spectroscopy; accept proton NMR; accept carbon-13 NMR]
[10h] The sample holders in NMR spectrometers perform this action to average out diffusional motion. In one form of NMR, this action is performed at a “magic angle” of 54.7 degrees to improve resolution.
ANSWER: spinning [accept magic angle spinning or magic angle turning; accept word forms like spun or turned; accept synonyms like rotating or word forms like rotation]
[10e] Magic angle spinning is used in a variant of NMR that analyzes samples in this state of matter. Substances in this state of matter have closely packed atoms and have a definite shape and volume.
ANSWER: solid [accept solid-state NMR or solid-state nuclear magnetic resonance]
<Edinburgh C, Chemistry>

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210617.0899%61%10%

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TeamOpponentPart 1Part 2Part 3TotalParts
Claremont BUCLA F1001020ME
UCLA AUC Irvine1001020ME
UCLA BUCSD A10101030MHE
UCLA CClaremont A1001020ME
UCLA DClaremont C1001020ME
UCSD BUSC B1001020ME
USC AUC Santa Barbara1001020ME

Summary

TournamentEditionExact Match?HeardPPBEasy %Medium %Hard %
Northern CaliforniaUSY422.50100%100%25%
Southern CaliforniaUSY721.43100%100%14%
Eastern Canada (1)USY417.50100%75%0%
Eastern Canada (2)USY915.56100%44%11%
FloridaUSY410.00100%0%0%
Great LakesUSY1020.00100%70%30%
Lower Mid-AtlanticUSY915.56100%56%0%
Upper Mid-AtlanticUSY918.89100%67%22%
MidwestUSY917.78100%78%0%
NorthUSY417.50100%50%25%
NortheastUSY1213.33100%33%0%
PacificUSY816.25100%50%13%
SoutheastUSY1217.50100%67%8%
Upstate NYUSY516.0080%80%0%