@X@user.full_name@X@ @GMU: The reaction below is a exothermic reaction. What would one have to do to increase the size of the equilibrium constant?H2(g) + O2(g)→2H2O(g)

@X@user.full_name@X@ @GMU: HO2 at 25°C reacts to form hydrogen peroxide and oxygen according to second order kinetics (see reaction below). The half-life for this reaction was measured to be 5.69e-2 s when the initial concentration of HO2 was 1.25e-8 M. What is the rate constant for this reaction?HO2(g) + HO2(g) → H2O2(g) + O2(g)

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 (C5H10(g)) = 347.7700 J/mol*K and the heat of formation of C5H10(g)) is -20.9300 kJ/mol.5C(gr) + 5H2(g) → C5H10(g)

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 1.479 atm at 27.56 °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 HCN if its acid dissociation constant is 4.900×10-10 ?

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of HCOOH increased by a factor of 1.764. The rate law of this reaction is Rate = k.HCOOH(aq) + Br2(aq) → 2Br-(aq) + CO2(g)

@X@user.full_name@X@ @GMU: What is the conjugate base and base dissociation constant of CH3COOH if its acid dissociation constant is 1.760×10-5 ?

@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: Uranium -238 decays in a series of steps to Pb-206. When the material is very old, one can treat the kinetics as a decay directly to Pb and the ratio of these two can be treated as a measure of the age of a rock. A rock containing 238U and 206Pb was examined to determine its approximate age. The molar ratio of 206Pb to 238U was 0.1807. Assuming no lead was originally present and that all lead formed remained in the rock, what is the age of the rock (in years)? The half-life of 238U is 4.50e9 yr.