Which of the following is true of ionic compounds?
A) They are liquids at room temperature.
B) They are solids in which individual molecules are present.
C) They are solids in which both cations and anions are present.
D) Depending on the compound any one of the above may apply.
C
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Why do 2500 economists, including eight Nobel Prize Winners in economics, believe that the U.S. tax system is backwards?
A. because it encourages more pollution B. because it encourages more jobs C. because it discourages resource waste D. because it discourages environmental degradation
The only major extinction event during the Paleozoic was at the end of the Ordovician. Indicate whether the statement is true or false
The current total world population is ________
A) 5 billion B) 9 billion C) 6 billion D) 8 billion E) 7 billion
Microbursts are associated with
A) nocturnal low-level jets. B) thunderstorms. C) hurricanes. D) tornadoes. E) none of the above