An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely:
A) structure (a)
B) structure (b)
C) structure (c)
D) All three structures are equally possible.
Answer: C
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Parallel-Plate Capacitor: Two parallel square metal plates, 8.4 cm on each side, are 2.5 mm apart and carry equal but opposite charge uniformly distributed over their facing surfaces. How much excess charge is there on each plate if the electric field between the plates has a magnitude of 2.0 × 106 N/C? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
The elements of Group ______________ are the most chemically active metals
Fill in the blank(s) with correct word
In Brazil, the longest period of daylight and the start of summer occurs during the month of
a. December. b. March. c. September. d. June.
The rings of Neptune:
A) were confirmed by the Voyager 2 in 1989. B) number five, with three narrow, two more diffuse. C) all lie within Neptune's Roche Limit. D) often appear as clumpy ring arcs, rather than complete and symmetrical. E) All of these are correct.