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A reverse osmosis plant desalinates 5x10^6 L/day of feedwater containing 1500mg/L of salts yielding 3x10^6 L/day of product water with 75 mg/L of salt.
Each car emits an average of 1.5 g/mi of NOx, and winds are blowing at 2 m/s across the freeway towards the house.
Consider an area-source box model for air pollution above a peninsula of land. the length of the box is 15 km, its width is 80 km
Aqueous lithium hydroxide solution is used to purify air in spacecrafts and submarines because it absorbs carbon dioxide according to the equation:
The determination of iron in industrial waste stream is often carried out by reacting the water sample with o-phenanthroline to form a red-orange complex
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry.
Write a balanced equation for the reaction using the lowest possible whole – number coefficients, and including the state of each compound.
Plot the vertical centerline SO2 concentration profile from ground level to 500 m at distances of 200 m, 1 km, and 5 km.
Estimate the steady-state concentration of SO2 for this area from this point source given the following temperature data. Windspeed= 5km/hr.
Are the relative LDLO for benzene and phenol as you would expect? How were the LDLO for humans obtained? How reliable are the LDLO?
What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?
Why are contaminant chemical properties important in selecting environmental technologies?
Calculate amount of 235U needed to fission to release this energy. Take into account, efficiency of converting nuclear energy into electricity.
Discuss how plastics are used in everyday life and cutting edge technology and what the pitfalls are of plastics.
Show how to derive the linear form of the Langmuir that would approximate behavior at low concentrations in solution. Calculate.
Suppose that the solvent ethanol could serve to replace the methanol in this process, but at the expense of double the concentrations.
In preparation for the 1992 UN Conference on the Human Environment in Rio de Janeiro, President George H. W. Bush's top economic.
Reduce the production of hazardous waste and encourage recycling and reuse of hazardous materials by charging producers a tax.
2g sample of harbour sediment was digested in aqua regia and then the filtered solution made up to 50mL and analysed by flame atomic absorption
Step-wise solution to a numerical problem related to a flocculation-based water treatment plant having a flow of 25 MGD.
The reactants are trans-chalcone and ethyl acetoacetate (in ethanol and NaOH). This creates 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone.
Write out the chemical equations showing how chlorine nitrate is formed in the stratosphere and for the reactions that convert it back.
Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 60 meters and a wind-conversion efficiency of 25 percent.
Analyze and evaluate the article as to it's contemporary relevance regarding the elements availability, health implications and environmental impact.
Examine the following structure of soap and explain why soap works. CH3(CH2)16C ONaO Nonpolar tail Polar head Sodium stearate a soap.