M 2 8 M correct Minhat Mohammad Haz Exam 5 Due 400 pm Inst Kohl 63

M 2 8 m correct minhat mohammad haz exam 5 due 400 pm

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1.0.913 M2.0.8 Mcorrect
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Minhat, Mohammad Haz – Exam 5 – Due: Dec 17 2006, 4:00 pm – Inst: Kohl 6 3. 0 . 64 M 012 (part 1 of 1) 2 points If the standard free energy change for combus- tion of 1 mole of CH 4 (g) is - 818 kJ · mol - 1 , calculate the standard voltage that could be obtained from a fuel cell using this reaction. 1. + 1.06 V correct 2. + 4.24 V 3. + 8.48 V 4. + 0.53 V 5. - 1.06 V Explanation: 013 (part 1 of 1) 2 points Which of the following statements is true? 1.The exponents in the rate-law must matchthe coefficients in the balanced chemical equa-tion for the reaction. 2.The rate-law for a reaction can be pre-dicted from the balanced chemical equation. 3.If the exponents in the rate-law do notmatch the coefficients in the balanced equa-tion, then we know that the reaction does nottake place in one step. 4.If the exponents in the rate-law match thecoefficients in the balanced chemical equation,then we know that the reaction takes place inone step. 2. changes if we add a strong base to a solution of the weak acid. 3. None of these correct 4. cannot be less than 10 - 7 . 5. cannot be greater than 10 - 7 . 6. changes with the pH of the solution. 7. does not change with temperature. Explanation:
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Minhat, Mohammad Haz – Exam 5 – Due: Dec 17 2006, 4:00 pm – Inst: Kohl 7 015 (part 1 of 1) 2 points Two aqueous solutions are separated by a semipermeable membrane. Solution A = 0.34 M KCl Solution B = 0.64 M KCl Which of the following statements is TRUE? 1. For a reverse osmosis process, pressure must be applied to solution A. 2. Cl - ions flow from solution B to solution A. 3. There is a net flow of H 2 O molecules from solution B to solution A. 4. K + ions flow from solution B to solution A. 5. Pressure must be applied to solution A to create an equilibrium flow of water molecules. 6. There is a net flow of H 2 O molecules from solution A to solution B. correct Explanation: The semipermeable membrane is only per- meable to water (the solvent), so only H 2 O can pass from solution A to solution B (or vice versa). As solution A is less concentrated than solution B, H 2 O molecules will sponta- neously travel from solution A to solution B in order to try and make the concentrations of the two solutions equal. 016 (part 1 of 1) 2 points Consider the famous ammonia preparation 3 H 2 (g) + N 2 (g) * ) 2 NH 3 (g) The equation K = [ x ] 2 [0 . 1 - 3 x ] 3 [0 . 7 - x ] is not a possible correct description of the equilibrium situation because 1. The equation is correct.
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  • Periodic Table, Chemical reaction, mol, Mohammad Haz, Minhat

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