Molecules and reactivity Samenvattingen, Aantekeningen en Examens

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 The correct answer is A. This is an Organic Chemistry question that falls under the content category "Separation and purification methods." The answer to this question is A because the ...

What are proteins? - Polymers of amino acids covalently bonded through peptide bonds into a chain What are the parts of an amino acid? - central carbon single hydrogen carboxyl group amino group R-group {side chain} What is the significance of the R-group {side chain}? - distinguishes one amino acid from another and dictates an amino acid's properties What is an oligopeptide? - less than 50 amino acids What is a polypeptide? - more than 50 amino acids How are peptide bonds...

AP Biology Midterm Exam Study Guide A hypothesis must be these 2 things... Testable and falsifiable What are the levels of organization? Molecules, organelles, cells, tissues, organs, organ systems, organism, population, community, ecosystem, biome, biosphere What is a theory? Well-tested explanation that unifies a broad range of observations and evidence What is a hypothesis? A supposition or proposed explanation made on the basis of limited evidence as a starting point for ...

Which of the following reactions could be driven by coupling to the hydrolysis of ATP? The change in free energy is given in units of kilojoules per mole ATP + H2O → ADP + Pi (-30.5) A. Maltose + H2O → 2 Glucose (-15.5) B. Pyruvate + Pi → Phosphoenolpyruvate (+31.7) C. Glycerol + Pi → Glycerol phosphate (+9.2) correct answer: C The example of water freezing into ice shows A. a decrease in entropy of the system. B. an increase in entropy of the system. C. no change in th...

AP Biology Unit 1 Test Complete Solutions water -polar molecule -polar colvalent bonds -oxygen end is partial negative and the hydrogens have a partially positive end -cohesive polar covalent bonds -opposite ends of the molecule have opposite charges cohesion -H bonding between H2O creates it (sticky) -allows for the movement of water against gravity -high surface tension -water moves up a tree by transpiration (helped by ____) adhesion -H2O molecules form H bonds with other substances ...

AP Biology Midterm Exam Study Guide A hypothesis must be these 2 things... Testable and falsifiable What are the levels of organization? Molecules, organelles, cells, tissues, organs, organ systems, organism, population, community, ecosystem, biome, biosphere What is a theory? Well-tested explanation that unifies a broad range of observations and evidence What is a hypothesis? A supposition or proposed explanation made on the basis of limited evidence as a starting point for ...

UWorld MCAT QBank Questions Missed Exam Questions And Answers Paramagnetic - answerUnpaired electrons in the electronic configuration of an atom or ion, which end up interacting with each other in a magnetic field Diamagnetic - answerPaired electrons in the electronic configuration of an atom or ion, which will NOT interact with each other in a magnetic field Electron capture - answerAn alternative form of positron emission (B^+ decay) Reactivity of forming Ionic Bonds - answerThis increases as ...

Three methods of separating compounds - ️️Filtration, sublimation, evaporation Filtration - ️️the process that separates a solid from the liquid in a heterogeneous mixture Sublimation - ️️A change directly from the solid to the gaseous state without becoming liquid Evaporation - ️️Removing a liquid from a mixture by turning it into a gas. Solve for the mass of a chemical in a container - ️️[mass total] - [mass empty dish] = [mass of chemical] Fire diamond colors - ️...

Atom the basic building block of matter that make up everyday objects Nucleus (atom) the center of an atom that contains the protons and neutrons Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:02 / 0:15 Full screen Electron Cloud the area around the nucleus of an atom where electrons are found Protons positive charged subatomic particles found in the nucleus Neutrons neutral charged subatomic particles fou...

Chem 219 Unit 4 Exam with Verified Solutions What are the four halogen elements? - Answer -F, Cl, Br, I organohalide compounds - Answer -Organic molecules containing halogen atoms (F, Cl, Br, I) Examples of how organohalide compounds are used by humans - Answer -- have been found in marine life (algae, mollusks, sponges, etc.), bc they metabolize the high concentrations of inorganic chlorides and bromides that are found in the seas. - Industrially, organohalides find uses as solvents, inse...