@X@user.full_name@X@ @GMU: Which base listed below would be the best to creat a buffer having a pH of 6.1764?

@X@user.full_name@X@ @GMU: Initially there were equilibrium concentrations of 0.3387 M A, 0.2024 M B, and 0.1151 M C. Which change will cause the equilibrium to shift from left to right if the reaction is endothermic? Use the reaction below.5A(aq) → 3 B(aq) +2 C(aq) K = 0.999

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 510.741 mm Hg at 25.27 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!

@X@user.full_name@X@ @GMU: What is the conjugate base and base dissociation constant of H2O2 if its acid dissociation constant is 2.400×10-12 ?

@X@user.full_name@X@ @GMU: What is the solubility in g/L of CH3Br at a partial pressure of 457.9 torr, if the solubility at a partial pressure of 363.1 torr is 7.211 g/L?

@X@user.full_name@X@  @GMU: When 9.794 g of aspirin was dissolved in 104.8 g of benzene, the freezing point was 275.9 K. What is the formula mass of this compound? The freezing point depression constant for benzene is 5.12 (°C*kg)/mol. The melting point and boiling points are 5.50°C and 80.10°C, respectively.

@X@user.full_name@X@ @GMU: NO2 at 383°C decomposes to form NO and O2 according to second order kinetics (see reaction below). The half-life for this reaction was measured to be 1.22e2 s when the initial concentration of NO2 was 1.71e-3 M. What is the rate constant for this reaction?2NO2(g) → 2NO(g) + O2(g)

@X@user.full_name@X@ @GMU: Calculate the of 100.07 mL of a buffer initially consisting of 0.1281 M CH3(CH2)2CH2NH2 and 0.1321 M CH3(CH2)2CH2NH3Cl after addition of 0.00163 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 value of Ksp in water, if 1.35e-5 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: Calculate the of 114.01 mL of a buffer initially consisting of 0.1752 M C2H5NH2 and 0.1926 M C2H5NH3Br after addition of 0.0031 mol of HCl. Assume that no volume change occurs after addition of the acid. The Kb of C2H5NH2 is 5.60e-4