Which of the following is the net ionic equation for the reaction of the strong acid HCl with the strong base NaOH?
A) H3O+(aq) + Cl-(aq) + Na+(aq) + OH-(aq) ? Na+(aq) + Cl-(aq) + 2H2O(l)
B) HCl(aq) + NaOH(aq) ? NaCl(aq) + H2O(l)
C) H3O+(aq) + OH-(aq) ? H2O(l)
D) none of these
C
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Populations can decline by increasing death rates. If this decline is gradual, the harmful effects can be mitigated. List three major problems associated with rapid population decline. Can you think of any positive outcomes of rapid population decline?
What will be an ideal response?
During the cold phase of the El Niño, the warmest waters are located at
A) A.
B) B.
C) C.
D) D.
Why is the Kuiper belt considered to be a zone of failed planet formation?
A) The dwarf planets found therein have yet to fully accrete all of the material in their orbital paths. B) There is simply not enough material within the dwarf planets' orbital paths for any of them to ever add up to full planetary status. C) Because none of the dwarf planets are massive enough to maintain an atmosphere. D) Both A and B are reasonable.
Though it is difficult to generalize for the ocean as a whole, the bottom of the euphotic zone is about ____ deep in mid-latitudes
A) 10 meters (33 feet) B) 70 meters (230 feet) C) 160 meters (525 feet) D) 500 meters (1,640 feet)