Some wastewater has a bod5 of 150 mg/l at 20 o c. nitrification was inhibited. the reaction rate k at that temperature has been determined to be 0.23 /day. (a) find the ultimate carbonaceous bod. (b) find the reaction rate coefficient at 15 o c. (c) find the bod5 at 15 o c.

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5

What are the two basic types of satellites