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The water supply for a midwestern city contains the followingimpurities: coarse sand, finely divided particulates,nitrate ions, trihalomethanes, dissolved phosphorus in theform of phosphates, potentially harmful bacterial strains,dissolved organic substances. Which of the following processesor agents, if any, is effective in removing each ofthese impurities: coarse sand filtration, activated carbonfiltration, aeration, ozonization, precipitation with aluminumhydroxide?

What distinguishes substances like salt and sugar from those found in e-waste like lead,mercury, cadmium and arsenic?

What mass of carbon dioxide is formed from burning one gallon of octane, C8H18? Octane has a density of 703 kg/m3.1 L = 0.2642 gal 1 lb = 453.592 gAn average tree absorbs 48 pounds of CO2 in one year. How many trees would you need to plant to offset the CO2produced from burning one gallon of octane every day for one year (365 days)?

2. Balance the following equation and calculate the volume of hydrogen gas produced from the reaction of 0.425 g of aluminum when completely reacted with excess hydrochloric acid. The gas was collected over water at 28 °C and a total pressure of 745 torr. Al (s) + HCl (aq) > AICI3 (aq) + H2 (g)

2) Write a balanced equation for the oxidation of ammonium ion by atmospheric oxygen to nitrate ion in an acidic medium. Note that there are microorganisms (e.g., ammonia oxidizing bacteria) that efficiently carry out this reaction in natural waters. loration oC What does the [F1 reveal about a drinking water source?

what is the Gravimetric analysis? how we can use it to determine the Phosphorus content of commercial plant food?

True or false: The elemental composition of soil humic substances is similar across habitats and geographical areas.

Chemistry

Aluminum (molar mass = 26.9815 g/mol) is refined from its oxide ore, Al2O3. If the electrical current that is flowing is 750.00 A, how long will it take to deposit 503.36 grams of aluminum? Report your answer in hours with 1 decimal place precision. Your Answer: Your Answer

Electrolysis is a type of redox reaction. The electroloysis of sea water is one potential process for production hydrogen gas used as a fuel. During the electrolysis of sea water, a secondary side reaction is possible due to sufficient salt concentrations. In this reaction, aqueous sodium chloride undergoes a redox reaction to produce sodium and chlorine gas. wwww a. Write the balanced molecular equation showing the electrolysis of sodium choloride. Use phase labels b. Write the oxidation half reaction c. Write the reduction half reaction d. How many electrons are transferred in this reaction?

When I balance it out with 2,15,10 and 10. Does not work I'm confused pls help.

please explain all the steps

1. If the animal population decreased, the amount of atmospheric carbon would:      A-increase   B-decrease   C-stay the same   2.Which of the following would help the most to fight the current processes that are shifting Earth's climate?       A-reduction of atmospheric oxygen   B-increase in atmospheric nitrogen   C-reduction in atmospheric carbon   D-increase in atmospheric carbon   3.Which of these processes produces carbon dioxide?    A-photosynthesis   B-burning of fossil fuels   C-animal perspiration   D-planting trees       4. What will be the most immediate effect if many trees are cleared by deforestation?    A-Decreased use of atmospheric carbon dioxide   B-Increased rates of decomposition   C-Increased production of organic compounds   D-Decreased combustion of fossil fuels   5. Only humans can remove carbon from this carbon sink/reservoir.   A-fossil fuels   B-plants   C-atmosphere   D-animals     6. When humans…