Chemistry concepts and calculations
117302 questions • Page 320 / 2347
6) Acid Base Catalysis-Mandelate racemase, as shown, catalyzes the racemization
6) Acid Base Catalysis-Mandelate racemase, as shown, catalyzes the racemization of mandelate. Atrolactate is a competitive inhibitor of the enzyme. The picture below shows (S)-atr…
6) Adding 128 kJ of energy to a beaker of acetone (46.07 g/mol) at its boiling p
6) Adding 128 kJ of energy to a beaker of acetone (46.07 g/mol) at its boiling point will vaporize how many grams of the liquid? (,ap for acetone is 3 1-3 kJ/mol) A) 4.09 g B) 188…
6) Bromine (Br2) has a heat of vaporization of 29.96 k/mol at its boiling point
6) Bromine (Br2) has a heat of vaporization of 29.96 k/mol at its boiling point of 58.8 C and a heat of fusion of 10.57 kKJ/mol at its freezing point of -7.2 C. Determine the reve…
6) Compared to its crystalline form, glass is generally: a) more dense b) less d
6) Compared to its crystalline form, glass is generally: a) more dense b) less dense c) porous d) opaque . 7) In which …
6) Compared to its crystalline form, glass is generally: a) more dense b) less d
6) Compared to its crystalline form, glass is generally: a) more dense b) less dense c) porous d) opaque . 7) In which of the following materials would be the most permeable to ni…
6) Consider the diagram given below: Eudiomet H(B 2 HC1(aq) Zn (s) 21.8 cm water
6) Consider the diagram given below: Eudiomet H(B 2 HC1(aq) Zn (s) 21.8 cm water 7.10 ml of 6.0 M HCl are added to 0.186 g 2n(s) in a tost tube. a) Write a balanced equation for t…
6) Consider the helical peptide shown below... (4 pts) Asp Fraction folded (pH 7
6) Consider the helical peptide shown below... (4 pts) Asp Fraction folded (pH 7) 0.8 Lys Fraction folded (pH 13) 0.6 0.4 Asp 0.2 ys 20 40 Temp (deg. C) 60 80 100 pKa, Asp 4 pKa, …
6) Electrolysis of molten KCl produces molecular chlorine at the anode; however,
6) Electrolysis of molten KCl produces molecular chlorine at the anode; however, in the electrolysis of an aqueous KCl solution, a gas is evolved. What is the gas and why is it pr…
6) Frontalin (2) is an insect pheromone responsible for aggregation of Southern
6) Frontalin (2) is an insect pheromone responsible for aggregation of Southern Pine Beetles, one of the most destructive insects in pines forest of the southeastern United States…
6) Hydrogen gas can be generated from the reaction between aluminum metal and hy
6) Hydrogen gas can be generated from the reaction between aluminum metal and hydrochloric acid: 2 Al (s) + 6 HCl (aq) 2 Alci, (aq) + 3H2(g) Suppose that 3.00 grams of Al are mixe…
6) Hydrogen gas can be generated from the reaction between aluminum metal and hy
6) Hydrogen gas can be generated from the reaction between aluminum metal and hydrochloric acid: 2 Al (s) + 6 HCI (aq) 2 AICI, (aq) + 3H2(g) us Suppose that 3.00 grams of Al are m…
6) Hydrogen gas can be generated from the reaction between aluminum metal and hy
6) Hydrogen gas can be generated from the reaction between aluminum metal and hydrochloric acid: 2 Al (s) + 6HCI (aq) 2 AIC, (aq) + 3H2 (g) a. Suppose that 3.00 grams of Al are mi…
6) If you know the amounts of acid and base components in the buffer you can use
6) If you know the amounts of acid and base components in the buffer you can use the equation to find the pH. Use the text to find the Ka for benzoic acid (C, H,COOH). Use the Hen…
6) In each case below, indicate which beaker will have a higher concentration of
6) In each case below, indicate which beaker will have a higher concentration of copper ion (Cu2+). Explain your choice, using chemical equations where appropriate. a) Beaker 1 co…
6) LITERATURE: A group of Japanese chemists (D. Tsuchiya, K. Moriyama, H. Togo)
6) LITERATURE: A group of Japanese chemists (D. Tsuchiya, K. Moriyama, H. Togo) has been publishing on creative uses of oxidation. Normally, organic chemists remove -CH2Ph (benzyl…
6) Match the following from Group X with Group Y [4 pts.]: Group X Group Y Amylo
6) Match the following from Group X with Group Y [4 pts.]: Group X Group Y Amylose …
6) McQuarrie & Simon, Problems 26.16 & 26.17: Consider the following two chemica
6) McQuarrie & Simon, Problems 26.16 & 26.17: Consider the following two chemical equations co(g) + H2O(g) CO2(g)+H2(g): CH,(g) + H20(g) C0(g)+3H2(g): a) Show that if we w…
6) The Harbor Process 6a.) The Haber process is an industrially important proces
6) The Harbor Process 6a.) The Haber process is an industrially important process that forms gaseous ammonia from the reaction between molecular nitrogen gas and molecular hydroge…
6) The Harbor Process 6a.) The Haber process is an industrially important proces
6) The Harbor Process 6a.) The Haber process is an industrially important process that forms gaseous ammonia from the reaction between molecular nitrogen gas and molecular hydroge…
6) The dipole moment of ClF is 0.88 D, and its bond length is 163 pm. What is th
6) The dipole moment of ClF is 0.88 D, and its bond length is 163 pm. What is the percent ionic character of the Cl-F bond? A) 0.54% B) 7.8% C) 11% D) 25% Answer: C 7) The dipole …
6) What is the concentration of a second order reaction at 867 seconds if the ra
6) What is the concentration of a second order reaction at 867 seconds if the rate constant is 0.0078 M-1-1 and its initial concentration was 0.888 M? A) 1.26x 10-1 M B)788 M 768 …
6) What is the most appropriate term for the tidal mouth of a river that opens o
6) What is the most appropriate term for the tidal mouth of a river that opens out to the ocean? Delta Estuary Lagoon Wetland 7) Tierra Helada, the elevation of 2800 to 4000 meter…
6) What is the voltage under standard conditons for the reaction: 2Ag(s) + I2(s)
6) What is the voltage under standard conditons for the reaction: 2Ag(s) + I2(s) ? 2Ag+(aq) + 2I-(aq)? 13)What is the standard voltage or cell potential of a Cr-Hg cell? (Remember…
6) When titrating a strong monoprotic acid and KOH at 25 degrees Celsius, the a)
6) When titrating a strong monoprotic acid and KOH at 25 degrees Celsius, the a) pH will be less than 7 at the equivalance point b) pH will be greater than 7 at the equivalance po…
6) Which of the following is TRUE for a system that is in dynamic equilibrium? A
6) Which of the following is TRUE for a system that is in dynamic equilibrium? A) The forward reaction goes to 100% completion. B) The reaction rate of the forward reaction approa…
6) Which of the following is TRUE for a system that is in dynamic equilibrium? A
6) Which of the following is TRUE for a system that is in dynamic equilibrium? A) The forward reaction goes to 100% completion. B) The reaction rate of the forward reaction approa…
6) Which of the following is always true for an isothermal process of an ideal g
6) Which of the following is always true for an isothermal process of an ideal gas? (a) The intemal energy does not change. (b) No heat flows into or out of the system (c) The pre…
6) Which of these techniques will increase the yield of purified crystal solids?
6) Which of these techniques will increase the yield of purified crystal solids? RETURN TO SITE Let all the liquid solvent evaporate before filtering. Plunge the hot flask of diss…
6) for each of the following reactions, indicate whichsubstance is oxidized and
6) for each of the following reactions, indicate whichsubstance is oxidized and which is reduced. which substance is theoxidizing agent and which is the reducing agent? …
6, ( 1 point) what is the mass % of carbon in each of the following compounds? a
6, ( 1 point) what is the mass % of carbon in each of the following compounds? a. CHO 7. (1 point) Calculate how many moles of NO2 form when each quantity of reaction completely r…
6, (15%) (a) Describe the step of the BOD test (b) Describe how to correct seed
6, (15%) (a) Describe the step of the BOD test (b) Describe how to correct seed bacteria in BOD test (c) Derive test L(t) In (-:2--kt for a BOD test. Start your answer by defining…
6, (15%) (a) Describe the step of the BOD test (b) Describe how to correct seed
6, (15%) (a) Describe the step of the BOD test (b) Describe how to correct seed bacteria in BOD test (c) Derive test L(t) In (-:2--kt for a BOD test. Start your answer by defining…
6- 0.012 moles of sodium sulphate are added to 400 ml of each of two solutions.
6- 0.012 moles of sodium sulphate are added to 400 ml of each of two solutions. One solution contains 1.5 x 10-3M barium chloride; the other contains 1.5 x 103M calcium chloride. …
6- A pure gold ring and pure silver ring have a total mass of 15.6 g . The two r
6- A pure gold ring and pure silver ring have a total mass of 15.6 g . The two rings are heated to 75.7 degre celcius and dropped into a 13.3 mL of water at 22.8 degre celcius . W…
6- The acid you used was vinegar, and the base you used was ammonia. Which subst
6- The acid you used was vinegar, and the base you used was ammonia. Which substance caused a greater change in the pH of each system, and why do you think this is so? (Keep in mi…
6- The true or accepted value for the heat of solution (H soln ) for KNO3 is rep
6- The true or accepted value for the heat of solution (H soln ) for KNO3 is reported as 34.89 kj/mol. Continuing from the previous problem ( slope = -2696 ) , calculate the accur…
6- Upon the addition of 6M HCl to solution containing cations from group I, Grou
6- Upon the addition of 6M HCl to solution containing cations from group I, Group II, and Group III a white precipitate forms, what cations could be present? A- Ag+ , Pb2+ B- Cu2+…
6-14: Study of Acid-Base Titrations-Polyprotic Acids (Virtual ChemLab) OVERVIEW:
6-14: Study of Acid-Base Titrations-Polyprotic Acids (Virtual ChemLab) OVERVIEW: The buret will be filled with NaOH, and 25.00 mL of H2SO3 will be in the beaker with the thymol bl…
6-14: Study of Acid-Base Titrations-Polyprotic Acids (Virtual ChemLab) OVERVIEW:
6-14: Study of Acid-Base Titrations-Polyprotic Acids (Virtual ChemLab) OVERVIEW: The buret will be filled with NaOH, and 25.00 mL of H2SO3 will be in the beaker with the thymol bl…
6-14: Study of Acid-Base Titrations-Polyprotic Acids (Virtual ChemLab) OVERVIEW:
6-14: Study of Acid-Base Titrations-Polyprotic Acids (Virtual ChemLab) OVERVIEW: The buret will be filled with NaOH, and 25.00 mL of H2SO3 will be in the beaker with the thymol bl…
6-17 From the solubility product of Zinc ferrocyanide Zn2 Fe (CN)6,calculate the
6-17 From the solubility product of Zinc ferrocyanide Zn2 Fe (CN)6,calculate the concentration of Fe(CN)6 in .1mM ZnSO4saturated with Zn2 Fe (CN)6 .Assume that Zn2 Fe(CN)6 is a …
6-7 6 SOLUTION REACTIONS: IDENTIFYING NAME THE CONTENTS OF SEVEN BOTTLES 1315 Se
6-7 6 SOLUTION REACTIONS: IDENTIFYING NAME THE CONTENTS OF SEVEN BOTTLES 1315 Secti Pre-Lab Assignment As noted in the DISCUSSION, this experiment requires some advanced planning …
6-7 6 SOLUTION REACTIONS: IDENTIFYING NAME THE CONTENTS OF SEVEN BOTTLES 1315 Se
6-7 6 SOLUTION REACTIONS: IDENTIFYING NAME THE CONTENTS OF SEVEN BOTTLES 1315 Secti Pre-Lab Assignment As noted in the DISCUSSION, this experiment requires some advanced planning …
6-7 Which statement is true of the internal energy of a system and its surroundi
6-7 Which statement is true of the internal energy of a system and its surroundings during an energy exchange with a negative Delta E(sys). The internal energy of the system incre…
6-When chlorine gas is bubbled into a solution of sodium bromide,the sodium brom
6-When chlorine gas is bubbled into a solution of sodium bromide,the sodium bromide reacts to give bromine, a red-brown liquid, andsodium chloride (ordinary table salt). A solutio…
6-methylthiobeptane-2-thiol 6-methylthio-2-mercaptoheptane 2-methylthiobeptane-6
6-methylthiobeptane-2-thiol 6-methylthio-2-mercaptoheptane 2-methylthiobeptane-6-thiol 2-mercapto-6-methylthiobeptane 8. Which of the groups listed below would have the highest pr…
6. (1 point) If a sealed syringe is plunged into hot water, in which direction w
6. (1 point) If a sealed syringe is plunged into hot water, in which direction will the syringe piston slide? * • No movement will occur. • In • Out • The direction cannot be pr…
6. (1 point) What is the correct net ionic equation for the reaction of acetic a
6. (1 point) What is the correct net ionic equation for the reaction of acetic acid and sodium A. H+(aq) + OH-(aq) H2O(l) B. HC2H3O2(aq) + NaOH(aq) NaC2H3O2(aq) + H2O(1) C. C2H30 …
6. (10 points, total) A substrate (S) consumption rate is given by the following
6. (10 points, total) A substrate (S) consumption rate is given by the following equation: 2 k[S] dt dS (ia) (5 points) Develop an equation to calculate final substrate concentrat…
6. (10 pts) A buffer is prepared such that ICH,cOOH, ICH,0L-0.100 M. What volume
6. (10 pts) A buffer is prepared such that ICH,cOOH, ICH,0L-0.100 M. What volume of 0,.125 M NaOH (aq) can that the buffer capacity is lost be added to 200.0 mL of this buffer sol…
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