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1. Consider a small lake, 0.4 mile across and 11 ft deep, that contains a total of 50 tons of dissolved oxygen. Calculate the BOD (i.e. calculate the amount of oxygen required to degrade the amount of organic waste given) if 6 tons of carbon-based waste is dumped into the lake. Round your answer to zero places past the decimal.
2. Repeat the BOD calculation as done in #1, but this time let's dump in 60 tons of carbon-based waste. Round your answer to zero places past the decimal.
3. The differences between the two cases above include all of the following: (Select all that apply)In the first case there is plenty of oxygen to go around but not enough in the second case.The BOD in the second case is larger than that in the first case.The BOD in the first case is exactly the same as the COD.In the first case there is a chance that the lake could recover.Chances are, in the second case the lake will not recover.
Determine the final temperature of the mixture. (Use 1g/mL as the density of water)
Write the complete stepwise mechanism for the reaction of cyclopentanone with bromine in acetic acid to give 2-bromocyclopentanone
Calculate the change in pH when 3.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
How wil you determie the relative reactivites of aromatic compounds? Outline the procedure that you need to do in the laboratory to determine the relative reactivites of the following:
Use the table of standard reduction potentials to calculate the equilibrium constant at a standard temperature (25 degrees C) for the following reactions:
A mole of photons in the blue visible region of the electromagnetic spectrum has an energy of 2.54 × 10 2 kJ/mol, calculate the frequency in s-1 of the photon.
How many grams of Ag2S can be generated from a mixture of 1.85 g Na2S and 3.58 g of AgNO3 given the following unbalanced reaction:
Magnesium sulfate can be obtained at a drugstore as Epsom salts. The monohydrate is found as the mineral kieserite (MgSO4 * H2O, 138 g/mol).
Compare the volume of 1.0 g of bromine, Br2, as a solid, liquid, and gas. The density of solid bromine just below the melting point of -7°C is 3.2 g/mL, of liquid bromine at 25°C is 3.1 g/mL.
In a combustion reaction 4 moles of C8H18 react with 8 moles of O2. If the actual yield of CO2 produced is 28.16 grams, what is the percent yield?
How many grams of sulfur (S) are needed to react completely with 355g of mercury (Hg) to form HgS?
ethanol or t-butyl alcohol were used instead of iospropyl alcohol in the attempted photochemical dimerization of benzophenone
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