Bonus

This compound was used as the base of a spray that preserved the color of Qin Shi Huang’s terra-cotta army by preventing their lacquer from degrading upon exposure to air. For 10 points each:
[10h] Name this molecule whose diverse uses include its ability to form stealth liposomes and its ability to act as an inert crowding agent in transformation and phase separation assays.
ANSWER: polyethylene glycol [or PEG; prompt on ethylene glycol or antifreeze]
[10e] Polyethylene glycol monomers are attached to each other by linkages composed of this functional group. This generally inert functional group consists of an oxygen wedged between two carbons.
ANSWER: ethers [or polyethers]
[10m] PEG is sold in branched, star, and comb forms based on its value for this quantity equal to the ratio of the weight average and number average molecular weights. This quantity measures a polymer’s heterogeneity.
ANSWER: dispersity [accept polydispersity index or PDI; accept Đ or D-stroke]
<Chemistry>
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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
British ColumbiaYale0101020EM
Chicago AUC Berkeley A0101020EM
Chicago BJohns Hopkins001010M
Cornell AMIT10101030HEM
FloridaOttawa0101020EM
Georgia StateArizona State001010M
HarvardToronto C010010E
Illinois ANorth Carolina A10101030HEM
IndianaWaterloo A0101020EM
LSENYU010010E
MarylandIllinois B0000
MichiganColumbia B010010E
MinnesotaTexas0000
NorthwesternToronto A10101030HEM
Penn StateUC Berkeley B010010E
RITVanderbilt010010E
StanfordRutgers0101020EM
Toronto BIowa State0101020EM
UCFNorth Carolina B010010E
VirginiaOhio State0000
Virginia TechGeorgia Tech010010E
WUSTL AColumbia A0101020EM
Waterloo BWUSTL B10101030HEM
Winona StateCornell B0000

Summary

TournamentExact Match?HeardPPBEasy %Medium %Hard %
2025 ACF NationalsYes2414.5875%54%17%