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@X@user.full_name@X@ @GMU: Determine the mole fraction of toluene if 6.5876 g of toluene, C7H8, was mixed with 9.96 g of benzene, C6H6. MW(C7H8) = 92.141 g/mol; MW(C6H6) = 78.114 g/mol.

@X@user.full_name@X@ @GMU: Initially there were equilibrium concentrations of 0.1797 M A, 0.3333 M B, and 0.1797 M C. Which change will cause Qc to be less than Kc? Use the reaction below.6A → 3 B +3 C Kc = 0.432

@X@user.full_name@X@ @GMU: What is the solubility in g/L of C2H4 at a partial pressure of 432.6 torr, if the solubility at a partial pressure of 322.1 torr is 0.05588 g/L?

@X@user.full_name@X@ @GMU: A mixture containing an initial concentration of 0.2000 M for H2 and 0.1762 M for Cl2 is allowed to come to equilibrium (see reaction below). What must be the equilibrium concentration of HCl?H2(g) + Cl2(g) → 2HCl(g) Kc = 5.00e16

@X@user.full_name@X@ @GMU: It took 963.2 s for 54.56% of a substance to react according to first-order kinetics. What is the value of the rate constant?

@X@user.full_name@X@ @GMU: A mixture containing an initial concentration of 0.1488 M for N2 and 0.1257 M for O2 is allowed to come to equilibrium (see reaction below). What must be the equilibrium concentration of NO?N2(g) + O2(g) → 2NO(g) Kc = 2.70e-18

@X@user.full_name@X@ @GMU: A possible reaction mechanism for the formation of NO2F is shown below. What is the molecularity of the rate-limiting step? (1) NO2(g) + F2(g) → NO2F(g) + F(g) Slow, rate determining (2) F(g) + NO2(g)→ NO2F(g) Fast, equilibrium

@X@user.full_name@X@ @GMU: The following data was obtained by the method of initial rates. What is the rate law for the reaction of A with B to produce product? [A]o [B]o Rate, M/s 0.279 0.226 5.67e-6 0.556 0.226 4.01e-6 0.279 0.346 1.33e-5

@X@user.full_name@X@ @GMU: Initially there were equilibrium concentrations of 0.3413 M A, 0.2951 M B, and 0.1629 M C. Which change will cause the equilibrium to shift from right to left if the reaction is exothermic? Use the reaction below.6A(aq) → 4 B(aq) +4 C(aq) K = 1.187

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 0.337 atm at 14.10 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!