About ____% of worldwide stocks of tuna, cod, and other large ocean fishes have disappeared in the last 50 years
A) 10
B) 30
C) 60
D) 90
D
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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. Since there are polar areas on this molecule, it is insoluble in water at room temperature. C. Water would be attracted to both ends of 1,4 butanediol, and it is infinitely soluble in water. D. A high boiling point means that the substance interacts with itself quite strongly. Therefore, this molecule is not soluble in water.
Early towns were usually built
A. near rich farmland. B. near rivers, lakes, and oceans. C. near railway centers. D. None of these are correct.
At what date will 50°N receive the largest amount of daylight?
A) March 21 B) June 21 C) September 22 D) December 21
Los Angeles type smog is primarily a result of
A) smoke. B) fog. C) photochemical reactions. D) advected coastal fog laden with salt crystals.