Wednesday
August 20, 2014

Posts by L**


Total # Posts: 9

College Chemistry
Calculate the electrode potential of a copper half-call containing 0.05M Cu(NO3). E^0 Cu2+/Cu = 0.337 V College Chemistry - DrBob222, Tuesday, April 20, 2010 at 5:19pm E = Eo - (0.0592/n)log[(Cu)/(Cu^+2)] Substitute 2 for n and 0.05 M for Cu^+2 and 0.337 for Eo. Solve. Am I ...
April 20, 2010

College Chemistry
Am I solving for Cu or do I plug a value in for that also?
April 20, 2010

College Chemistry
Calculate the electrode potential of a copper half-call containing 0.05M Cu(NO3). E^0 Cu2+/Cu = 0.337 V
April 20, 2010

College Physics
A 5.0 gram coin is placed 5.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 RPM is reached and the coin slides off. A.) What is the coefficient of ...
March 23, 2010

College Chemistry Lab
For the following mixture, determine the initial concentration of Fe^3+. 0.00250M Fe^3+ --- 8.00mL 0.00250M SCN^- --- 7.50mL 0.10M HNO3 --- 4.50mL
March 16, 2010

College Chemistry Lab
Determine the molarity of FD&C Yellow #5 in the following solution that's prepared by mixing the dye solution with water and alcohol. None of the solutes react with one another. 6.35x10^-5M FD&C Yellow #5 = 6.50mL deionized water = 6.50mL ethyl alcohol = 6.80mL
March 16, 2010

College Chemistry Lab
Suppose that a 2.50x10^-6M solution of red dye No. 2 had an absorbance of 0.585 at its wavelength of maximum absorbance. A second solution of red dye No. 2 is too concentrated to read its absorbance so 5.00 mL of the concentrated dye solution was diluted with water to a volume...
March 16, 2010

College Chemistry Lab
The absorbance of a 9.25x10^-8M solution of a fabric dye was measured to be 0.835 at a particular wavelength. What would the absorbance be for a 4.65x10^-8M solution of the same dye under identical conditions?
March 15, 2010

College Chemistry Lab
The absorbance of a 6.3x10^-5M solution of an iron complex was measured to be 0.328 at the optimum wavelength. A second solution of the iron complex has an absorbance of 0.833 measured under identical conditions. What is the molarity of the complex in the SECOND SOLUTION?
March 15, 2010

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