@X@user.full_name@X@ @GMU: What is the potential of a cell at 25oC for which the reaction below applies, if the molar concentrations of Ni2+(aq) and H+ are 0.164 M and 2.88e-6 M, respectively? The H2(g) pressure is 1 atm at 25oC.2H+(aq) + Ni(s) → Ni2+(aq) + H2(g) Ecoell = 0.260 V

@X@user.full_name@X@ @GMU: What is the solubility in g/L of N2 at a partial pressure of 485.7 torr, if the solubility at a partial pressure of 376.9 torr is 0.009587 g/L?

@X@user.full_name@X@ @GMU: What is the temperature at which the reaction below becomes spontaneous, if the standard entropies of reactants and products at 25oC are So (C(gr)) = 5.74 J/mol*K, So(H2(g)) = 130.68 J/mol*K, and So (C8H14(g)) = 446.3500J/mol*K and the heat of formation of C8H14(g)) is 82.4600 kJ/mol?C8H14(g) → 8C(gr) + 7H2(g)

@X@user.full_name@X@ @GMU: The cell potential was -4.59e-2 V at 25oC and a Sn2+(aq) concentration of 0.131 M. What was the hydronium ion concentration? The H2(g) pressure was 1 atm at 25oC.2H+(aq) + Sn(s) → Sn2+(aq) + H2(g) Ecoell = 0.140 V

@X@user.full_name@X@ @GMU: What phase(s) exist at point 1 in the phase diagram below?

@X@user.full_name@X@ @GMU: How much energy in kJ is released to form one mole of 197Au from protons, electrons, and neutrons if the nucleus has a mass of 196.966543 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

@X@user.full_name@X@ @GMU: What is the value of Ksp in water, if 1.70e-6 M of A2B2 dissolves according to the reaction below?A2B2(s)→2A(aq) + 2B(aq) where A and B are ions

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of Cl2 increased by a factor of 1.669. The rate law of this reaction is Rate = k1/2.CHCl3(g) + Cl2(g) → CCl4(g) + HCl(g)

@X@user.full_name@X@ @GMU: Calculate the of 107.61 mL of a buffer initially consisting of 0.1647 M CH3(CH2)2CH2NH2 and 0.1877 M CH3(CH2)2CH2NH3NO3 after addition of 0.0020 mol of HCl. Assume that no volume change occurs after addition of the acid. The Kb of CH3(CH2)2CH2NH2 is 4.10e-4

@X@user.full_name@X@ @GMU: What is the free energy change for the reaction below, if the reaction quotient, Q, at 25.0oC is equal to 8.59e-6?2C2H2(g) + H2(g) → C4H6(g) ΔGo = -216.790 kJ.