Quick! which is the most accurate description of an element's symbol? a. it is made up of 1 or 2 letters. b. the second letter is always capitalize c. the first letter, or the only letter, is always lower cased. d. it is always the first letter, or the first and second letters, of the name of the element.

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.

What are the two largest greenhouse gases

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.