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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 (C4H10(g)) = 310.1000J/mol*K and the heat of formation of C4H10(g)) is -126.1400 kJ/mol.C4H10(g) → 4C(gr) + 5H2(g)

@X@user.full_name@X@ @GMU: What is the concentration of OH- in 0.1381 M CH3COOH ? See reaction belowCH3COOH + H2O → CH3COO- + H3O+ Ka = 1.760×10-5

@X@user.full_name@X@ @GMU: What would the [OH-] be after addition of 15.04 mL of 0.1000 M NaOH to 25.00 mL of 0.1000 HA (a weak acid, Ka = 5.86e-5)?

@X@user.full_name@X@ @GMU: Which base listed below would be the best to creat a buffer having a pH of 9.3373?

@X@user.full_name@X@ @GMU: Determine the concentration of A after 91.005 seconds if the initial concentration of A was 0.3741 M and the first order rate constant is 1.265e-2 s-1.

@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 2.08e-7?4C2H2(g) + 5 H2(g) → C8H18(g) ΔGo = -819.870 kJ.

@X@user.full_name@X@ @GMU: If you raise the pressure from what it is at point 1 to that of point 5, you go from a ___ to _____.

@X@user.full_name@X@ @GMU: Which of the answers below is the correct representation according to the shorthand method of the following galvanic cell?Ni2+(aq) + Al(s) → Ni(s) + Al3+(aq)

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of H+ increased by a factor of 1.525. The rate law of this reaction is Rate = k[BrO3-][Br-][H+]2.BrO3- + 5Br- + 6H+ → 3Br2 + 3H2O

@X@user.full_name@X@ @GMU: To what temperature would you have to heat Ni(l) to cause its vapor pressure to become 186.4 mm Hg if its heat of vaporization and boiling point are 428.00 kJ/mol and 3005.2 K, respectively?