R = reactants P = productsGiven that the above energy profiles have the same scale, which of the reactions is the most exothermic?
A. a
B. b
C. c
D. d
E. none of the above
Answer: A
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The sea level pressure distribution across the world is:
A) randomly distributed. B) disorganized and widely scattered. C) organized into high and low pressure areas. D) not well-known by scientists.
Because of the harsh contrast in salinity, estuaries are among the last productive of marine habitats
Indicate whether the statement is true or false
A home located about 500 feet from an abandoned landfill explodes in a giant ball of flames. This is a mystery, as the home only uses electricity for cooking and heating. Most likely, this disaster was caused by ________
A) gasoline or other flammable substances that leached from the landfill into the home B) corrosives that leached from the landfill into the home and degraded the home's electrical wires C) groundwater contamination from the landfill into the home D) methane that seeped from the landfill along horizontal cracks and into the home
Dengue fever, an infectious tropical disease carried by mosquitoes, has
A) shifted equatorward due to desertification in the subtropics. B) spread previously unaffected areas due to changes in climatic conditions. C) been eradicated due to the extinction of Aedes aegypti mosquitoes due to climate change. D) never been reported in the U.S., but scientists fear it may arrive due to expansion of Aedes aegypti mosquitoes. E) been nearly wiped out because of climate change related shifts in subtropical high pressure cells.