After processing, metals are separated from their ores by ____________.
Fill in the blank(s) with the appropriate word(s).
smelting
You might also like to view...
Methane (CH4 ), nitrous oxide (N2O), and chlorofluorocarbons (CFCs) are greenhouse gases
Indicate whether the statement is true or false
Which of the following are classified as heavy metals?
A) carbon, hydrogen, oxygen B) aluminum, iron, silicon C) nitrogen, phosphorus, potassium D) lead, mercury, cadmium E) any nonbiodegradable materials
A sample of water that is 99.9999% pure contains 0.0001% impurities. Consider from Chapter 1 that a glass of water contains on the order of a trillion trillion (1 × 1024) molecules. If 0.0001% of these molecules were the molecules of some impurity, about how many impurity molecules would this be?
A. 1,000,000,000,000,000,000 (one million trillion: 1 × 1018) B. 1,000,000 (one million: 1 × 106) C. 1000 (one thousand: 1 × 103) D. 1,000,000,000 (one billion: 1 × 109)
Hoover Dam was built in the 1930's on the Colorado River, and at that time was extremely important as an employment project
The United States was just coming out of the Great Depression and it was viewed as a life-saver by thousands of people across the country. Now this dam is 80 years old. Drawing from information in this chapter about aging dams, what is a severe problem that could be expected? What will be an ideal response