Blog

@X@user.full_name@X@ @GMU: What is the solubility in g/L of NO at a partial pressure of 360.2 torr, if the solubility at a partial pressure of 456.7 torr is 0.03426 g/L?

@X@user.full_name@X@ @GMU: The osmotic pressure of a 17.490 mM solution of Na3PO4 is 951.569 mm Hg at 20.71 °C. How many ions per formula unit of Na3PO4 must there be? The compound may not be completely ionic.

@X@user.full_name@X@ @GMU: What is the solubility in g/L of CO at a partial pressure of 580.7 torr, if the solubility at a partial pressure of 417.8 torr is 0.01601 g/L?

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 (C7H12(g)) = 407.0900 J/mol*K and the heat of formation of C7H12(g)) is 103.0600 kJ/mol.7C(gr) + 6H2(g) → C7H12(g)

@X@user.full_name@X@ @GMU: What is the value of Ksp in water, if 1.64e-6 M of A3B2 dissolves according to the reaction below?A3B2(s)→3A(aq) + 2B(aq) where A and B are ions

@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.