Chemistry, 11.04.2020 00:53, watervliet2586
You are asked to test the biochemical oxygen demand of a stream in your town. After observing the BOD over a week, you calculate that the water has a BOD of 150 mg of oxygen, which is a relatively high level. This leads you to conclude that
A. the water has a high level of oxygen
B. The water is likely contaminated with high levels of pollution or waste
C. the water quality is safe for most aquatic organisms
D. The high level of oxygen demand is likely caused y natural decomposition
E. The water is safe for drinking
Answers: 3
Chemistry, 21.06.2019 23:00, orlando19882000
Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende
Answers: 1
You are asked to test the biochemical oxygen demand of a stream in your town. After observing the BO...
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