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Suppose that automobiles were equipped with "thermite" batteries that operate according to the following half-reactions:
2Al + 6OH- Al2O3 + 3H2O + 6e-
Fe2O3 + 3H2O + 6e- 2Fe + 6OH-
What masses of Al and Fe2O3 would be consumed if it takes 15 sec to start your car engine and the battery provides 5.4 A of current to the starter motor. Faraday's constant is 96485 C/mol.
What weight of A would be removed by four successive extractions with 25-mL portions of ligroin? How much ligroin would be required to remove 98.5% of A in a single extraction?
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.59. What was the concentration of the solution.
a container has a mass of 78.91 grams when empty and 92.44 g when filled with water. the density of water is 1.000
Calculate the OH concentration of a solution of Na2CrO4 0.225M. (the sodium salt of chromic acid). (Chromic acid is H2CrO4, a diprotic acid, Ka1= 1.80x10^-1, Ka2=3.20x10^-7 & Kw=1.00x10^-14).
Problem- A liquid mixture of 20 mol% benzen, 50 mol% toluene, and 30%m-xylene is to be partially vaporized at 1 atm pressure. What is the lowest and the highest temperature at which vaporization will occur
D-(-)-Menthol can be isolated from the peppermint plant and is responsible for the characteristic flavor and taste of peppermint. The structure of (-)-menthol is
if a 2.743g sample of MgSO4 7H2O were heated strongly, what would be the expected mass of the cooled dehydrated salt? (use M=246.471g mol-1 as the molar mass of MgSO4 7H2O.
The procedure calls for the addition of 7-8 drops of aqueous NaOH. What is the purpose of the base here? Be specific and show the reaction that occurs
Discuss the breakdown of glycogen. List all the enzymes and their roles. In addition, explain the regulation of the reaction of glycogen breakdown.
State the number of grams of water that can be obtained by the reaction
Calculate the amount of heat needed to convert 96 g of ice at 24 C to water at 28 C. The specific heat capacity of H2O(s) is 2.1 J/(g C).
cu/cu^2+ concentration cell has voltage of .21V at 25 c. the concentration of cu^2+ in one of the other half cell is 1.4E-3M. What is the concentration of{Cu^2 + in the other half-cell
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