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@X@user.full_name@X@ @GMU: ACS-Which of the following is the weakest reducing agent? Au1+ + 1e- → Au E° = 1.680 Mn2+ + 2e- → Mn E° = -1.180 Ag1+ + 1e- → Ag E° = 0.800 Cu2+ + 2e- → Cu E° = 0.340

@X@user.full_name@X@ @GMU: ACS-Radioactive substances decay by first-order kinetics. How many days would be required for a sample containing iodine-131 to decrease to 67.42% of its initial activity? The half-life of iodine-131 is 8.07 days.

@X@user.full_name@X@ @GMU: ACS-It took 600.2 s for 67.16% of a substance to react according to first-order kinetics. What is the value of the rate constant?

@X@user.full_name@X@ @GMU: ACS-What is the free energy change for the reaction below? 2VO2+(aq) + 4H+(aq) + Ni(s) → 2VO2+(aq) + 2H2O(l) + Ni(s) E° = 1.230V

@X@user.full_name@X@ @GMU: Using the Boltzmanns formula calculate the entropy of 1.74e11 coins if they are randomly distributed.

@X@user.full_name@X@ @GMU: ACS-What is the free energy change for the reaction below? CrsO72-(aq) + 14H+(aq) + 6I-(aq) → 2Cr3+(aq) + 3I2(aq) + 7H2O(l) E° = 1.870V

@X@user.full_name@X@ @GMU: ACS-What is the free energy change for the reaction below? CrsO72-(aq) + 14H+(aq) + 6Br-(aq) → 2Cr3+(aq) + 3Br2(aq) + 7H2O(l) E° = 0.140V

@X@user.full_name@X@ @GMU: What is the coefficient, b, in the reaction below, if Kc = 1.60e-4 and Kp = 40.0469 at 494.05°C?3A(s) + bB(g) → 5C(g)

@X@user.full_name@X@ @GMU: ACS-Determine the cell potential for the reaction below if [Cd2+] = 0.1554M and [Fe3+] = 0.0131M 3Cd2+(aq) + 2Fe(s) → 3Cd(s) + 2Fe3+(aq) E°= -0.360V

@X@user.full_name@X@ @GMU: ACS-Determine the cell potential for the reaction below if [Al3+] = 0.4655M and [Zn2+] = 0.0168M 2Al3+(aq) + 3Zn(s) → 2Al(s) + 3Zn2+(aq) E°= -0.920V