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@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!

@X@user.full_name@X@ @GMU: What is the rate constant at 46.61°C for the reaction below if the rate constant is 3.70e-5 s-1 at 25.00°C and the activation energy is 104.00 kJ/mol?2N2O5(g)→ 4NO2(g) + O2(g)

@X@user.full_name@X@ @GMU: Initially there were equilibrium concentrations of 0.1537 M A, 0.3333 M B, and 0.1537 M C (see reaction below). The concentration of C was suddenly increased to 10.92 M. What was the approximate concentration of each after equilibrium had been re-established?4A → 3 B +4 C Kc = 0.512

@X@user.full_name@X@ @GMU: What is the boiling point elevation when 19.28 g of lysine (formula mass = 146.00 g/mol) is dissolved in 158.43 g of benzene? The boiling point elevation constant is 2.530 (°C*kg)/mol.

Consider the reaction.H2(g) + I2(s) ⇋2HI(g)What is the correct expression for Kc?