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Suppose a solution is tested for nitrite ion by adding 3M sulfuric acid and heating, repeating this process until no further reaction occurs. This solution is then analyzed for nitrate ion by adding iron (II) sulfate solution and more sulfuric acid, heating the test tube and its contents. The nitrate ion reaction is positive. In this case, is it accurate to state that nitrate ion was present in the original solution? Brie?y explain, referencing specific chemical reactions to support your explanation.
the energy carried away by one mole of potassium is 295KJmol^-1. What is the wavelength of a single photon? What is the color of this light emitted
Important information about Proteins, A globular protein in aqueous surroundings contains the following amino acid residues; phenylamine, methionine, glutamate, lysine, and alanine.
The appropriate chemical equation is PCl3(g)+Cl2(g) PCl2 Calculate the new partial pressures after equilibrium is reestablished.
A galvanic (voltaic) cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potential for t..
explain the following observations: a)an open can of soda loses its "fizz" more quickly at room temperature than in the refrigerator. b) chlorine gas in tap water escapes as the sample warms to room temperature. c)less sugar dissolves in iced coff..
Ethylene, C2H4, and water react under appropriate conditions to give ethanol. The reaction is C2H4(g) + H2O(g) C2H5OH(g) An equilibrium mixture of these gases at a certain temperature
A grizzly bear eats 20 fish per day, and a pollutant at a concentration of 30 ppb contaminates the fish. On average, the pollutant remains in the bear's body for 2 years. What is the steady-state concentration (in ppm) of the pollutant in the bear
In Europe, gasoline efficiency is measured in km/L . If your car's gas mileage is 30.0 miles/gal, how many liters of gasoline would you need to buy to complete a 284- km trip in Europe?
Explain why an object whose color is purple actually absorbs visible light in the green wavelength region.
C2H4 Flows into a catalytic reactor at 25atm and 300 degrees C with a flow rate of 1010 L/min. Hydrogen at 25atm and 300 degrees C with a flow rate of 1050L/min. If 11.0kg of C2H6 are collected per minute, what's the percent yield of the reaction?
A 24.9 mL volume of HCl reacts completely with 55.0 mL of aqueous Na2CO3. The reaction is as follows:2HCl (aq)+ Na2CO3(aq)-> CO2(g)+H2O(l)+2NaCl(aq)
For the reaction CH4+202=2H2O+CO2, calculate the percent yield of carbon dioxide if 1000. g of methane react with excess oxygen to produce 2300. g of carbon dioxide.
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