@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 2.700e-4 M-1s-1 at 327.00°C and 8.80e-4 M-1s-1 at 349.11°C?H2(g) + I2(g) → 2HI(g)

@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 1.14e-7?4C2H2(g) + 3 H2(g) → C8H14(g) ΔGo = -601.570 kJ.

@X@user.full_name@X@ @GMU: LiCl has a face-centered cubic unit cell in which the Cl- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is the radius of Li+ if the ionic radius of Cl- is 181.0 pm and the density of LiCl is 2.068 g/cm3?

John Schreifels @GMU: What is the balanced reaction for the following galvanic cell?Ni(s)| Ni2+(aq) || Fe3+(aq) | Fe(s)

John Schreifels @GMU: What is the total entropy change at 25oC for the reaction below, if the standard entropies of reactants and products are So(C(gr)) = 5.74 J/mol*K, So (H2(g)) = 130.68 J/mol*K, and So (C5H8(g)) = 331.1100J/mol*K and the heat of formation of C5H8(g)) is 144.4200 kJ/mol.C5H8(g) → 5C(gr) + 4H2(g)

@X@user.full_name@X@ @GMU: When 0.3436 g of citric acid was dissolved in 100.1 mL of water, the osmotic pressure at 14.13°C was 0.4212 atm. What is the formula mass of this compound?

@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