The boiling point of 1,4-butanediol is 230°C. Would you expect this compound to be soluble or insoluble in room-temperature water?
A) Since there are no polar areas on this molecule, it is insoluble in water at room temperature.
B) A high boiling point means that the substance interacts with itself quite strongly. Therefore this molecule is not soluble in water.
C) Since there are polar areas on this molecule, it is insoluble in water at room temperature.
D) Water would be attracted to both ends of 1,4 butanediol, and it is infinitely soluble in water.
Answer: D
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What effect are magnetic fields thought to have on star formation in molecular clouds?
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This diagram represents Earth's rotation and orbit. What do we call the flat blue plane shown in this diagram?
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The flow of water emerging from a hole in a container is best described in terms of
A) Torricelli's law. B) Pascal's principle. C) Archimedes' principle. D) Poiseuille's equation. E) Newton's Second law.
Which of the following statements about various stages of core nuclear burning (hydrogen, helium, carbon, and so on) in a high-mass star is not true?
A) Each successive stage creates an element with a higher atomic number and atomic mass number. B) As each stage ends, the reactions that occurred in previous stages continue in shells around the core. C) Each successive stage lasts for approximately the same amount of time. D) As each stage ends, the core shrinks and heats further.