Which of the following pairs of reactants is best suited for the synthesis of aspirin?
A) salicin and acetic acid
B) salicylic acid and acetic acid
C) salicin and acetic anhydride
D) salicylic acid and acetic anhydride
D
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During December solstice, the
A) entire area poleward of the Antarctic Circle remains out of sunlight. B) entire area poleward of the Tropic of Capricorn remains out of sunlight. C) entire area poleward of the Arctic Circle remains out of sunlight. D) entire area poleward of the Tropic of Cancer remains out of sunlight.
The San Andreas Fault system formed in response to the migration of triple junctions as the North American plate
moved along the Pacific plate. a. True b. False
About what percentage of Earth's land surface is covered by deserts?
A) 3% B) 15% C) 30% D) 55%
Ninety-five percent of light incident on a mirror is reflected. How much light is reflected from three mirrors in succession?
A. 95% B. 81% C. 86% D. 90%