How much of the world's table salt is produced by the evaporation of seawater?
a. One quarter
b. One third
c. One half
d. Three-quarters
ANS: B
Some of the ocean's extracted salt is used for snow and ice removal. It is also used in food processing
and agriculture. Information can be found in the section Physical Resources
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Which of the following reactions illustrates an amphoteric compound?
A. NaOH + HBr ? NaBr + H2O B. 2 H2 + O2 ? 2 H2O C. 2 HF ? H2F+ + F- D. All are amphoteric. E. none of the above
What does the term mining mean in the context of groundwater resources?
a. refers to hand dug vertical water wells b. refers to horizontal mine shafts excavated to tap water from the interior of a mountain c. refers to separating out minerals from groundwater by chemical solution d. refers to the situation where water is taken out of the ground faster than it is replaced e. refers to quanats in the Middle East
The formation of acetone from acetoacetate is an example of which of the following type of reaction?
A) decarboxylation B) hydrolysis C) reduction D) oxidation
The United States has one of the largest ecological footprints of any nation. We also have the fastest population increase of any developed nation. Does this combination of factors affect the ability of the United States to call for movement toward a sustainable global population??
Fill in the blank(s) with the appropriate word(s).