Chemistry > EXAM REVIEW > AAMC FL 1 FULL REVIEW- Chem/Phys | 60 Questions with 100% Correct Answers | Updated & Verified | 25 (All)

AAMC FL 1 FULL REVIEW- Chem/Phys | 60 Questions with 100% Correct Answers | Updated & Verified | 25 Pages

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In the chromatography of the reaction mixture, water absorbed on cellulose functioned as the stationary phase. What was the principal factor determining the migration of individual components in the ... sample? A.Hydrogen bonding B.Solute concentration C.Stationary phase concentration D.Thickness of paper - ANS - B and D are dumb options. Knock them out. hydrogen bonding to the stationary phase will determine the relative rate of migration of the various components in the sample. When thinking migration, think bonding. If it bonds super well, it isn't going to move very far. What assumption is being made if scientists conclude that aspartic acid was formed by the prebiological synthesis in the passage? A.Aspartic acid is unstable at temperatures below 150°C. B.All of the malic acid underwent the dehydration reaction to form fumaric/maleic acid. C.Compound A and cyanide were available on primitive Earth. D.The reaction between ammonia and fumaric acid was catalyzed by the presence of water. - ANS - POE: D- is wrong. water is not a catalyst [Show More]

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