What are these two do concentrations in units of ppm

Reference no: EM131258828

1. In 1981, concentrations of Pb, Cu, and Mn in rainwater collected in Min-neapolis were found to be 9.5, 2.0, and 8.6 µg/L, respectively. Express these concentrations as nmole/L, given that the atomic weights are 207,63.5, and 55, respectively.

2. The dissolved oxygen (DO) profile in a biological reactor (i.e., aeration tank) at a domestic wastewater-treatment plant is OS mg/L in the anoxic zone and 8 mg/L near the end of the 108-ft-long tank. What are these two DO concentrations in units of

(a) ppm,

(b) moles/L?

Reference no: EM131258828

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