In what stage of wastewater treatment is 90 percent of the oxygen-demanding substances removed from the waste by microbes? primary treatment. secondary treatment. tertiary treatment. septic tank treatment.

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution