Soft Water Contains Relatively Large Concentrations of

Q23: Which of the following is considered to

Q24: What percentage of water on the earth

Q25: A stagnant pond has an odor like

Q26: Many communities are beginning to use sludge

Q27: All of the following atoms are found

Q29: Fluorides are added to water to<br>A)kill viruses.<br>B)remove

Q30: The principal cations in hard water are

Q31: Acid rain results in the release of

Q32: The saltiness of the oceans is<br>A)decreasing slowly.<br>B)increasing

Q33: Lakes and streams with granite rock bottoms