33) A solution made by dissolving 9.81 g of a nonvolatile nonelectrolyte in 90.0 g of water boiled at 100.37 o C at 760 mm Hg. What is the approximate molecular weight of the substance? (For water, Kb = 0.51 o C/m) [DTb = Kb * m]
Blog
13) Consider the following reaction mechanism: Step1: I–Cl …
13) Consider the following reaction mechanism: Step1: I–Cl + H2 → H–I + HCl (Slow) Step 2: I–Cl + H–I → HCl + I2 (Fast) The species HCl _________ while H–I _________________.
28) Complete the statement to give a correct answer. The str…
28) Complete the statement to give a correct answer. The stronger the acid, __________
16) If the rate law for the overall reaction [2A + 3B → Prod…
16) If the rate law for the overall reaction [2A + 3B → Products] is first order in A and second order in B, then the rate law for this reaction is____
21) Consider the following equilibrium: …
21) Consider the following equilibrium: Which of the following changes will cause the equilibrium to shift to the left? 2SO3(g) Arrow(1).png 2SO2(g) + O2(g) à [DHº = +198 kJ]
25) What is the coefficient of the permanganate ion (MnO4-1)…
25) What is the coefficient of the permanganate ion (MnO4-1) on the reactant side when the following equation is balanced? How many electrons are being transferred when Mn in permangnate ion (MnO4-1 ) is being reduced to Mn+2? MnO4-1 + Br-1 → Mn+2 + Br2 (acidic solution)
38) What is the pH of a solution prepared by dissolving 0.35…
38) What is the pH of a solution prepared by dissolving 0.35 mol. of solid methylamine hydrochloride (CH3NH3Cl) in 1.00 L of 1.1 M methylamine (CH3NH2)? The pKa for methylamine (CH3NH2) is 10.64.
6)Phase diagrams are used to depict changes in the propertie…
6)Phase diagrams are used to depict changes in the properties of solutions. Below is the phase diagram of a polar solution.Question 24(2).png What processes are occurring at point D? Condensation and vaporization Deposition and sublimation Freezing and melting
36) The density of a 2.45 M aqueous solution of methanol (CH…
36) The density of a 2.45 M aqueous solution of methanol (CH3OH) is 0.976 g/mL. What is the molality of the solution? Molality.pngmoles.png
40) Calculate the standard entropy change for the following…
40) Calculate the standard entropy change for the following reaction, CCl4(l) + O2(g) → CO2(g) + 2 Cl2(g) Given that So[CCl4(l)] = 216.40 J/K • mol; So[CO2(g)] = 213.74 J/K • mol; So[O2(g)] = 205.14 J/K • mol; and So [Cl2(g)] = 223.07 J/K • mol.