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Determine E° for the reduction half-reaction Ce4+(aq) + e- → Ce3+(aq), given that the cell voltage for the following voltaic cell is E°cell = 1.887 V:
Co(s)|Co2+(1 M)||Ce4+(1 M), Ce3+(1 M)|Pt(s)
The wavelength corresponding to the threshold frequency to tungsten surface is 230nm. Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
Calculate approximately the value for the heat of sublimation of methane and calculate the pH for this solution
A power company burns approximately 474 tons of coal per day to produce electricity. If the sulfur content of the coal is 1.30% by weight.
What is the wavelength of a light ray if its frequency is 4.64 x 1014 s-1? answer in units of nanometers (nm).
What is the solubility product constant? Given Ksp = 1.1 x 10^-3 for BaF2(s), calculate the molarity of Ba+2 in a saturate solution of BaF2 (at equilibrium).
You have 50 mL of 0.010 fully protonated histidine. how many milimoles of base must be added to bring histidine solution to pH equivalent to the pI of histidine.
If 25.00 mL of 0.687 M Fe(NO3)2 are added to a flask containing 0.289 g of aluminum metal, what compounds will be present in the flask once the reaction is complete? (Ignore water, etc.)
0.0010 mg of H, 0.0116 mg of C, and 0.0310 mg of O. It was also determined that the unknown compound had a molecular weight of 90.0 g/mol.
Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq)
What is the emprical formulae of the compound whose composition by mass is 1.32g of carbon dioxide contain 0.36g of carbon.
Description of Lipids 1) What are the ingredients of a cephalin? 2) Which fatty acid is always unsaturated in a cephalin? Why?
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu.
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