It is a soil-forming regime that occurs in humid tropical and subtropical climates as a result of high temperatures and abundant precipitation A Podzolization B) Salinization Laterization D) Calcification
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- pneumonia is characterized by fever (a body temperature) does the patient have a body temperturr that indicates that he has pneumonia? justify your answer with suitable caculation PLEASE.The so called hydrogen economy is based on hydrogen produced from water using solar energy. The gas may be burned as a fuel: 2H2 (g) + O2 (g) ---> 2H2O (l) A primary advanatge of hydrogen as a fuel is that it is nonpolluting. A major disadvantege is that it is a gas and therefore is harder to store than liquids or solids. Calculate the volume of hydrogen gas at 25oC and 1.00 atm required to produce an amount of energy equivalent to that produced by the combustion of a gallon of octane (C8H18). The density of cotane is 2.66 kg/gal and its standard entalpy of formation is -249.9 kj/mol.Photosynthesis in plants converts carbon dioxide and water into glucose (C6H1206) and oxygen according to the equation below. 6CO2 (g) + 6H20a → C6H1206 (s) + 602 (g) Substance СО2 (8) H20M C6H1206 (s) 02 (g) kJ AH°; (mol -393.5 -285.8 -1273.3 J H° mol. k 213.6 69.9 209.2 205.0 Calculate the AHº, ASº, and AGº. Is the reaction spontaneous at standard conditions?
- Describe the process of catalytic cracking used in petroleum refining industry.Your answer must include : (1) a balanced chemical equation inluding physical states and reaction conditions (2) example of a product formed from catalytic cracking in petroleum refining and its usediscuss some ways in which the concentration of asolution can be expressed, and the kinds of informationwe can derive from the different units of measure.Hydrogen peroxide solutions can easily be decomposed by dust, trace amounts of metals or light. It istherefore necessary to periodically determine the purity of the peroxide solutions.This can be done via a redox titration as follows: The density of a particular surgical grade hydrogen peroxide solution is 1.11g.cm-3. Exactly 10 mL of this solution was pipetted and quantitatively transferred, along with a sufficientamount of a dilute sulphuric acid solution, into a 250.00 mL volumetric flask and made up to the mark. A 25.00 mL portion of this diluted solution is pipetted into a conical flask, and titrated with a0.372 M KMnO4 solution. The endpoint of the titration is determined when the colourless solution in the conical flask turns apersistent bright pink due to the presence of excess permanganate ions. The average titration value is 26.20 mL of the KMnO4 solution 1.Determine the percentage of the hydrogen peroxide in the solution sample.2. Naturally occurring manganese…
- (a) A commercial 737 jet transporting 143 passengers and 5 crew members from Kansas City (MCI) to Baltimore (BWI) burned 11,800 lb (about 1700 gallons) of Jet A fuel en route. Jet A fuel is kerosine based, consisting primarily of CnH2n+2 hydrocarbons, with n =6 to 16, so the carbon:hydrogen ratio is close to 1:2. During this flight, how much CO2 was released into the atmosphere? Assume the combustion of the fuel was complete, so all the fuel was burned to form CO2 and H2O. Give both the mass of CO2 produced (in kg and in lbs) and the volume it would occupy at 298 K, 1 atm.(b) How much CO2 would be released into the atmosphere if those passengers and crew made the trip instead, in pairs, in hybrid cars at 40 miles per gallon. Assume the density of the gasoline is 0.75 kg L-1 and that carbon and hydrogen dominate the composition in a ratio of 1:2. The road trip is 1082 miles.Effervescent tablets contain both citric acid (C6H8O7) and sodium bicarbonate (NaHCO3) and release carbon dioxide gas when dissolved in water as well as forming trisodium citrate (Na3C6H5O7) and water. A typical effervescent tablet contains 1.00 g of citric acid and 1.92 g sodium bicarbonate. (a) Assuming that carbon dioxide acts as an ideal gas, determine the work done due to the evolution of carbon dioxide by the dissolution of one effervescent tablet in water at 25.0 °C and atmospheric pressure (1 atm i.e. 101325 Pa).Natural gas consists primarily of methane, CH4(g).(a) Write a balanced chemical equation for the completecombustion of methane to produce CO2(g) as the onlycarbon-containing product. (b) Write a balanced chemicalequation for the incomplete combustion of methaneto produce CO(g) as the only carbon-containing product.(c) At 25 °C and 1.0 atm pressure, what is the minimumquantity of dry air needed to combust 1.0 L of CH4(g) completelyto CO2(g)?
- 4. Calculate the cation exchange capacity of the soil in which the following amounts of exchangeable cation are found. g/100g soil 0.0025 0.0152 Cation meq. wt. meq/100 g soil H K 0.3650 0.0920 Са Mg NH, 0.0580You are working with an artist who has been commissionedto make a sculpture for a big city in the eastern UnitedStates. The artist is wondering what material to use to makeher sculpture because she has heard that acid rain in theeastern United States might destroy it over time. You takesamples of granite, marble, bronze, and other materials,and place them outdoors for a long time in the big city.You periodically examine the appearance and measure the mass of the samples. (a) What observations would leadyou to conclude that one or more of the materials are wellsuitedfor the sculpture? (b) What chemical process (or processes)is (are) the most likely responsible for any observedchanges in the materials?Chemistry A young adult (60 kg body weight) drinks two beers of 12 oz. each, over a period of 10 minutes. Assuming instantaneous dilution of alcohol in the total body water after finishing the beers, (Alcohol content in beer is 6 %; density of alcohol is 0.9 g /mL.; 1 oz. = 30 mL.; 80% proof = 40% v/v alcohol; elimination rate is about 10 mL/hour (zero order) (b) one hour after drinking the beers. Assuming that the plasma level of 100 mg /dL is the index of intoxication, was legally drunk this person?