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@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 (C8H8(g)) = 345.2600J/mol*K and the heat of formation of C8H8(g)) is 147.8500 kJ/mol?C8H8(g) → 8C(gr) + 4H2(g)

@X@user.full_name@X@ @GMU: What is the value of Ksp in water, if 3.47e-6 M of A2B3 dissolves according to the reaction below?A2B3(s)→2A(aq) + 3B(aq) where A and B are ions

@X@user.full_name@X@ @GMU: The pH of a solution of H3O+ was 3.062. What was the hydronium ion concentration?

@X@user.full_name@X@ @GMU: How much energy in kJ is released to form one mole of 116Cd from protons, electrons, and neutrons if the nucleus has a mass of 115.904755 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 standard free energy change for the ionization of H2O acid, if its Ka is 1.00e-14.

@X@user.full_name@X@ @GMU: To what temperature would you have to heat bromine, Br2,(l) to cause its vapor pressure to become 402.4 mm Hg if its heat of vaporization and boiling point are 31.40 kJ/mol and 331.9 K, respectively?

@X@user.full_name@X@ @GMU: The pH of a solution of HClO3 was 3.254. What was the hydronium ion concentration?

@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 1.18e-6?C2H2(g) H2(g) → C2H4(g) ΔGo = -141.144 kJ.

@X@user.full_name@X@ @GMU: When 0.3676 g of citric acid was dissolved in 104.9 mL of water, the osmotic pressure at 26.69°C was 0.4491 atm. What is the formula mass of this compound?

@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 (C9H16(g)) = 484.8200J/mol*K and the heat of formation of C9H16(g)) is 61.8300 kJ/mol?C9H16(g) → 9C(gr) + 8H2(g)