In a chemical reaction, ________
A) new elements are formed B) new atoms are formed
C) atoms are destroyed D) atoms are rearranged
D
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Temperature inversions increase outdoor air pollution because they
A. accelerate photochemical reactions. B. are taller than most smokestacks. C. prevent brown air smog. D. prevent the natural mixing of air. E. accelerate the emission of primary pollutants.
Which of the following are produced when formic anhydride reacts with ethanol?
A) acetic acid and ethyl formate B) acetic acid and methyl formate C) formic acid and methyl formate D) formic acid and ethyl formate
Relief refers specifically to a landscape's ____
a. latitude b. earthquake hazard potential c. volcanic hazard potential d. elevation difference between the highest and lowest points e. population density
The Exclusive Economic Zones established by the 1982 Law of the Sea Treaty
A. could be claimed by more than one nation, which will result in appeals to the United Nations for conflict resolution. B. include up to 200 nautical miles of the continental shelf offshore of a country's border or further if that country's petition to the United Nations is approved. C. encompass, in different areas, such diverse resources as fish, placers and metal-rich muds. D. include all of the choices.