Which equations are balanced? a) Mg (s) + 2HCl (aq) ? MgCl2 (aq) + H2 (g) b) 3Al (s) + 3 Br2 (l) ? Al2Br3 (s) c) 2HgO (s) ? 2 Hg (l) + O2 (g)
A) Only equation "c" is balanced.
B) Equations "a" and "c" are balanced.
C) Equations "b" and "c" are balanced.
D) All of them are balanced.
B
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The reason almost all hurricanes form in the equatorial regions of the earth is because
A) it has the largest source of warm water. B) the Coriolis force is the strongest. C) vertical wind shear is the greatest. D) there is stronger vorticity near the equator.
Which of the following correctly describes membrane proteins?
A) They are suspended on the surface of the membrane. B) They are partly embedded in the bilayer. C) They pass completely through the bilayer. D) Any of the above, depending on the specific membrane protein.
What structural feature is associated with the prostaglandin F (PGF) group?
A) a carbonyl at carbon-9 B) a carboxylate at carbon-9 C) hydroxyl groups at carbon-9 and carbon-11 D) none of the above
You run a business selling bait to fisherman near the tip of a large sand spit. A sand and gravel company owns coastal property up the coast from you—the other direction from the tip of the spit
The sand and gravel company plans to dredge sand from the beach and mine the sand and gravel from a seacliff that is eroding in the coastal zone. What should be your opinion on this sand and gravel operation? A) There is no problem; the operator will increase sediment supply to the beach which will help your little sand spit. B) There is no problem; the longshore drift is away from you. It is people up the coast who should be concerned. C) You should look for a lawyer or a real estate agent because the sand and gravel operation will destroy your sand spit in time D) You should go into business with the sand and gravel operator and have them deliver sand to your beach to help tourism.