a certain reaction has the following generaln form

74,738 results, page 7

  1. Chemistry

    Which of the following has no effect on the rate ofa reaction? a)degree of branching or size of reactant molecules b)value of Heat of reaction c)presence of a catalyst d)temperature of the reactants e) concentrations of the reactants
  2. Chemistry

    When copper wire is placed into a silver nitrate solution, silver crystals and copper(II) nitrate solution form. If 57.1 g silver is actually recovered from the reaction, determine the percent yield of the reaction.
  3. Science

    Use the following equation: CO(g) + 2H2 (g)= CH3OH(g) delta H = -21.7 kcal Which direction will the reaction proceed after some of the methanol vapor is condensed and removed from the reaction vessel? please help im getting so confused on the directions of the reactions
  4. a level chemistry

    variation of the rate constant with temperature for the first order reaction 2N2O(g) = 2N2O4(g) + O2(g) is given in the following table. determine graphically the activation energy for the reaction. |t(k)|273 298 318 338 |k(second)| 7.87 x 10^3. 3.46 x 10^5. 4.98 x 10^6. 4.87 ...
  5. chemistry

    For the reaction 4NH3(g) + 3O2(g) -> 2N2(g) + 6H2O(g) , K = 10^80 at a certain temperature. Initially, all reactants and products have concentrations equal to 12 M. What is the approximate concentration of ammonia at equilibrium? a. 3 M b. 12 M c. 18 M d. 6 M e. 0 M
  6. chemistry

    Consider the following reaction. 2KClO3(s) → 2KCl(s) + 3O2(g) a. How many grams of KCl are produced from the complete reaction of 2.16 mol of KClO3? 161g b. How many grams of KCl are produced from the complete reaction of 52.7 g of KClO3? 32.1 g
  7. chemistry

    Heterogenous equilibrium of ammonium bisulfide. Ammonium bisulfide NH4HS forms ammonia NH3 and hydrogen sulfide H2S through the reaction NH4HS(s) arrows + H2S(g). This reaction has a kp value of 0.120 at 25 C. A 5.0-L flask is charged with .400g of pure H2S(g) at 25 C. ...
  8. chemistry

    a 1.009g mixture of the solid salts Na2SO4 and forms an aqueous solution with the precipitation of PbSO4. The precipitate was filtered and dried and its mass was determined to be .471 g. the limiting reactant was determined to be Na2SO4. Write the molecular form of the ...
  9. Chem Urgent Help

    Plz explain in detail.... i tried to search on internet but i am confused with co-efficents.. how to set up the equaiton .. plz help me ??? Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use ...
  10. chemistry

    Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the following equation: CH4(g)+H2O(g) = CO(g) + 3H2(g) In a particular reaction, 26.5 L of methane gas (measured at a pressure of 736 torr and a temperature of 25 C ) is ...
  11. Chemistry 152

    For a certain reaction, the enthalpy change is -148.5 kJ, the entropy change is 256 J/K, and the free energy change is -250.1 kJ. At what temperature is the reaction occurring, in C? Choose one answer. a. 85 b. 102 c. 124 d. 158 e. 210 I keep using equation delta G=delta H-T(...
  12. Math! Please Help!

    1. What is the simplified form of (–3x^3y^2)(5xy^–1)? I think it is 15x^4y 2. What is the simplified form of –9m^–2n^5 × 2m^–3n^–6? I have no idea on this one. :/ 3. A rectangular pasture has a fence around the perimeter. The length of the fence is 16x^7 and the ...
  13. physics - stopping distance

    when a driver brings a car to a stop by breaki.g as hard as possible the stopping can be regarded as the sum of reaction distance and breaking distance. tje following data are given, v1 m/s contains 10,20,30. reaction distance are 7.5, 15, 22.5. the breaking distance are 5.0, ...
  14. Physics- Energy Released In Chemical Reaction

    The reaction between two hydrogen isotopes is shown below: 2H + 3H → 4He + n + energy released The energy released in this reaction is: a.equal to that in a fission reaction b.equal to that in a chemical reaction. c.less than that in a chemical reaction. d.greater than that ...
  15. Chemistry VERY DIFFICULT

    Imagine you have been given a series of materials to react together and the following enthalpy change data has been recorded. Explain the terms exothermic and endothermic, and identify which of the following are exothermic and endothermic reactions. Ensure that you explain ...
  16. chemistry

    Consider the following reaction:4HCl(g)+O2(g)produces 2H2O(g) + 2Cl2(g) How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? Express your answer as an integer.
  17. chemistry

    Consider the following overall reaction which is experimentally observed to be second order in AB and zero order in C: AB+C -> A+BC Determine whether the mechanism below is valid for this reaction AB+ AB -> AB(sub 2) + A slow AB(sub2) + C -> AB+BC fast
  18. chemistry

    Consider the following overall reaction which is experimentally observed to be second order in AB and zero order in C: AB+C -> A+BC Determine whether the mechanism below is valid for this reaction AB+ AB -> AB(sub 2) + A slow AB(sub2) + C -> AB+BC fast
  19. chemistry

    Under standard conditions for all concentrations, the following reaction is spontaneous at 25 ¢XC with EO = 0.16 V. + - 02 (g) + 4 H (aq) + 4 Br (aq) -+ 2 H20 (I) + 2 Br2 (1) If [H+] is a?justed by adding a buffer of 0.10 M NaOCN and 0.10 M HOCN (Ka = 3.5 x 10 ), what value ...
  20. Chemistry

    Classify the possible combinations of signs for a reaction's ∆H and ∆S values by the resulting spontaneity. A) Spontaneous as written at all temperatures. B) Spontaneous in reverse at all temperatures. C) Spontaneous as written above a certain temperature. D) ...
  21. Chemistry

    can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical reaction, how many grams ...
  22. Chemistry

    can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical reaction, how many grams ...
  23. Chemistry

    . In a biochemical reaction, A + B-->C with äG = 30 kJ/mol. Which of the following reactions might be effectively coupled to this reaction so that it becomes more spontaneous? I. C + D are the reactants, and B + E are the products äG = -40 kJ/mol II. C + D are the ...
  24. Chemistry

    An important process for the production of acrylonitrile C3H3N is given by the following reaction 2C3H6 + 2NH3 + 3O2 --> 2C3H3N + 6H2O A 150 -L reactor is charged tot he following partial pressures at 25 C P(C3H6) = .5 MPa P(NH2) = .8 MPa P(O2) = 1.5 MPa What mass of ...
  25. science

    Are there any particular rules that govern whether or not a complex ion will form from a certain ion or do you just have to know them?
  26. chemistry

    2. What is the percent yield of Mg3N2 if 73.9 g of Mg reacts with 31.6 g of N2 to produce 79 g of Mg3N2 according to the following chemical reaction? (Reaction may or may not be balanced.) mg+n2=Mg3N2
  27. chemistry

    I am given the following reaction: 2NH3(g) -----> N2(g) + 3H2(g) 6.4 mols of ammonia gas has been put into a 1.7 L flask and has been permitted to reach equilibrium in accordance to the reaction listed above. If the equilibrium mixture has 4.2 mols of nitrogen, what is the ...
  28. chemistry

    A first order reaction and a separate second order reaction both have the same rate of reaction. What is the effect on the rate of reaction for each reaction if the concentrations of reactants in both reactions are halved?
  29. Chemistry

    Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2<===>N2O4 a) Calculate Change in reaction G* and K for this equilibrium. b) Calculate the (e) (the measure of the progress of the reaction) for this equilibrium if 1.00 mol NO2 were present...
  30. Chemistry

    I would like to check my answer to the following question: The permanganate ion oxidizes bromide in acidic conditions to form bromine, manganese(II) ion and water. Give the balanced equation of the reaction. My answer: 3e- + 8H+ (aq) + MnO4- (aq) + 2Br- (aq)  Br2 (aq...
  31. chem help!

    Which statement is true about a reaction at equilibrium? A. The reaction is not reversible. B. The reaction concentrations of the reactants and products are always equal. C. The reaction rates of the forward and reverse reaction are always equal. D. The change in concentration...
  32. chemistry

    The activation energy of a reaction is typically determined by calculating the rate constant for the reaction at two temperatures and then manipulating the Arrhenius equation. If you determine the reaction rate constants for a particular reaction to be 0.0650 /s at 25.0 C and ...
  33. Science - Chemistry

    Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. How many moles of Aluminum are needed to form 3.4 moles of Aluminum oxide? Writr the equation and balance it. 4Al + 3O2 ==> 2Al2O3 The equation tells you that 4 mols Al are needed to form 2 ...
  34. Chemistry

    Use enthalpies of formation from the textbook to calculate the standard enthalpy of the reaction for the following methane- generating reaction of methanogenic bacteria given delta Hf of CH3NH2=-22.97kJ/mol: 4CH2NH2+2H2O----->3CH4+CO2+4NH3
  35. Chem

    The accepted value for the enthalpy for the following reaction reaction is 466.85 kJ/mol. Mg + 2Hcl = MgCl2 + H2 Calculate the heat that would be generated if 5.00g of magnesium reacts with excess hydrochloric acid. I don't even know how to start this problem, please help
  36. ~Chem

    I was looing over this question and the answer I got was not correct, I noticed that somone already posted this question up before but maybe if I provide the answer I could get an understanding of the steps. @462degrees the reaction heat + 2NOCl <=> 2NO + Cl2 has an ...
  37. Chemistry

    A catalyst is: A. a solid product of a reaction. B. one of the reactants in a single-replacement reaction. C. not used up in a reaction. D. the product of a combustion reaction. C?
  38. Chemistry

    Which of the following elements is most likely to form an ion that will then form an ionic bond with an ion of a Group 1A element? Pt I Fr Be
  39. chemistry

    Elemental zinc will react with acid to evolve hydrogen gas. This is a redox reaction. Write a balanced molecular equation for the reaction of zinc and hydrochloric acid, showing the coefficents and the phases of all reactants and products. Below is an example of the form of ...
  40. Chemistry 101

    Which of the following will not increase the rate of a reaction? a. using a catalyst b.increasing the temperature c. decreasing the concentration of a reactant d. finding a shorter path for the reaction to take place e. increasing the kinetic energy
  41. science

    For the following reaction if the reaction temperature was increased would the equilibrium shift to the right or the left,not shift at all,or you cant answer the question because Keq is not given? 2SO3(g)<-->2SO2(g)+O2(g)..(deltaH degrees =198kj) Why???
  42. chemistry

    A 1.009g mixture of Na2SO4 (molar mass=142.04 g/mol) and Pb(NO3)2 (molar mass= 331.20 g/mol)? A)write th3 molecular form of the equation for the reaction. b)write the net ionic equation for the reaction.
  43. Chemistry

    The value of the equilibrium constant, Kc, at a certain temperature is 4.20 x 10-2. Would the reaction as represented by the chemical equation favor reactants or products? Enter Product or Reactant. PCl5(g) = PCl3(g)+Cl2(g)
  44. 9th grade algebra (sequences)

    Can you check my homework please? Given the following representations, tell whether it's arithmetic/geometric, find the difference/ratio, find the explicit formula, find the recursive formula, and the given term. (This whole question was in the form of a table) 1. -6, 12, 24...
  45. biology

    Which of the following elements is most likely to form an ion that will then form an ionic bond with an ion of a Group 1A element? Be I Fr **my choice Pt
  46. pre-algebra

    Which of the following does NOT represent a domain? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A) The total number of oranges Andre has from buying bags of oranges at the store B) The number of minutes that have passed while reading pages from a book C) How many sandwiches are made ...
  47. ORGANIC CHEMISTRY

    NAME THE PROCESSES OR TECHNIQUES IN THE FOLLOWING. 1.SEPARATION OF A SOLID FROM A SOLUTION 2.WHEN WATER IS COLD TO FORM ICE 3.WHEN WATER IS BOIL TO FORM VAPOR 4.WHEN IODINE IS HEATED DIRECTLY TO FORM GAS WITHOUT BEING LIQUID 5.WHEN STEAM IS COLD TO FORM WATER 6.WHEN TWO ...
  48. Chemistry

    Cyclopropane reacts to form propene in the gas phase. The reaction is first order in cylclopropane and has a rate constant of at 485 . If a 2.5 reaction vessel initially contains 724 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to ...
  49. chem

    stilll didn't get it .. .. can u plz explain in detail ... how did u get the answer.. plz plz plz plz plzp l zp thnks Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use average bond enthalpies ...
  50. Chemistry

    1. Hydrogen gas combines with oxygen gas to yield water. if 15 g O2 is present in the reaction, compute how much water will be produced. 2. Ten (10)grams methane gas combines with oxygen gas to form water and carbon dioxide. How much water is produced from the given reaction? ...
  51. Chemistry

    Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15°C. ...
  52. 8th grade math

    How do you turn these equation into a standard form? this is the standard form: ax+by=c here are the following equations: 2x = y + 1/2 y - 2 = 1/4x + 1 3y + 3 = 6x - 15 Please help and explain. Thank you.
  53. Chemistry

    Draw a reaction profile (diagram of energy vs reaction coordinate) for a hypothetical reaction AB +C <=> A+BC in which the foward reaction has an activation energy of 100kJ mol-1 and the backward reaction has an activation energy of 75kJ mol-1. (ii). a catalyst ...
  54. Chemistry

    Which of the following is the BEST explanation for why a catalyst speeds up a reaction? A) The catalyst increases the concentration of the products B) The catalyst decreases the total pressure in the container. C) The catalyst raises the temperature of the reaction mixture. D...
  55. Chemistry

    Which of the following is the BEST explanation for why a catalyst speeds up a reaction? A) The catalyst increases the concentration of the products B) The catalyst decreases the total pressure in the container. C) The catalyst raises the temperature of the reaction mixture. D...
  56. Chemistry

    Which of the following is the BEST explanation for why a catalyst speeds up a reaction? A) The catalyst increases the concentration of the products B) The catalyst decreases the total pressure in the container. C) The catalyst raises the temperature of the reaction mixture. D...
  57. Chem

    K so this time it is basic concept and I am suppose to guess what happens, so I've written the cause but I have also written my answer to the reaction and effect. so for: A + B <=> C stress: A is increased reaction: forward effect:[A]increased [B] inc [C]inc Stress: B is...
  58. chemistry

    Reaction 1: I2(aq)Cu^+2(aq) Ag^+(aq)Br2(aq) Column 1---Column 2---Column 3---Column 4---Column 5 I-(aq)---X---X---T---T Cu(s)---T---X---T---T Ag(s)---X---X---X---T Br-(aq)---X---X---X---X Reaction of metals and solution of ions Reaction 2: Ag+(aq)Pb2+(aq)Cu2+(aq)Zn2+(aq) ...
  59. science

    All living things must carry out certain functions and possess certain structures to survive, grow, and reproduce. The following chart illustrates how humans possess certain structures to carry out these critical functions. Fill in the plant structures that correspond to the ...
  60. chemistry

    For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
  61. Chemistry

    If a catalyst is added to a system at equilibrium and the temperature and pressure remain constant there will be no effect on the: (1) rate of the forward reaction (2) rate of the reverse reaction (3) activation energy of the reaction (4) heat of reaction 4, am i right ?
  62. Chemistry

    For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
  63. chemistry

    The following questions are about the reaction of sodium oxide with nitric acid. 1)What mass of sodium oxide would be needed to react with acid to form 0.5 mol salt? I said 1.5 2) How much sodium oxide would be required to neutralise 230cm3 of 1.0moldm-3? 3) 2.0gof sodium ...
  64. Chem18

    Coal can be used to generate hydrogen gas by this endothermic reaction: C(s) + H2O(g) CO(g) + H2(g) If this reaction is at equilibrium, which of these stresses would increase the formation of hydrogen gas? (choose ALL of the possible answers - there may be more than one.) a. ...
  65. Chemistry

    Calculate [Fe^2]+ when the cell reaction reaches equilibrium? A voltaic cell is constructed based on the following reaction and initial concentrations: Fe^2+,( 0.0055 M ) + Ag+,( 2.5 M ) ----> Fe^3+,( 0.0055 M ) + Ag(s) Calculate [Fe^2]+ when the cell reaction reaches ...
  66. chem

    Calculate the number of liters of hydrogen, measured at STP, that can be produced from the reaction of 0.155 mol of aluminum according to the following unbalanced chemical reaction equation. i got .193 L of H2 but it was wrong. i only have one submition left!
  67. chem

    Consider the following unbalanced equation: C2H5OH(g) + O2(g) → CO2(g) + H2O(l) 1.55 g of ethanol reacts with 10.0 g of oxygen. What is the total volume of gas present (in L) after the reaction is complete, assuming the reaction takes place at 1.00 atm and 25oC? A) 0.572...
  68. chem

    Using LeChatelier's principle, predict the direction of the net reaction in each of the following system as a result of decreasing the volume of the chamber for the reaction mixture. Where does the direction shifts? a.) N2(g)+ O2(g)= 2NO(g) b.) PCl5(g)=PCl3(g)+Cl2(g) c.) CO(g...
  69. chemistry

    For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
  70. chemistry

    For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
  71. Chemistry

    Consider the following reaction. 2KClO3(s) ¨ 2KCl(s) + 3O2(g) A)How many grams of KCl are produced from the complete reaction of 10.9 mol of KClO3? B)How many grams of KCl are produced from the complete reaction of 86.2 g of KClO3?
  72. Chemistry

    Virtually all the nitric acid manufactured commercially is obtained by the ammonia oxidization process. This involves this first step: Ammonia gas combines with oxygen to form nitrogen monoxide and water vapour. a) Write a balanced equation for the reaction 6 NH3 + 4 O2 -> ...
  73. chemistry

    How many {\rm NO}_{2} molecules would form as products if the reaction had a percent yield of 75\%?
  74. Chemistry

    What is the balanced equation for the reaction including states? Does it form a precipitate? Cu(NO3)2 + KI
  75. Chemistry

    At 25°C, K = 0.090 for the following reaction. H2O(g) + Cl2O(g) equilibrium reaction arrow 2 HOCl(g) Calculate the concentrations of all species at equilibrium for the following case. 1.3 mol pure HOCl is placed in a 1.6 L flask [HOCl]________ [Cl2O]________ [H2O]________ ...
  76. CHEMISTRY

    Identify the conjugate base in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)? Identify the Bronsted-Lowry acid in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)
  77. science

    Ice erodes and deposits sedimebts to form ______ what? river beds? Glacial beds? I am not certain of the context here.
  78. chemistry

    The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l) ΔH°rxn = -511.3 kJ/mol ΔU...
  79. chemistry

    aspirin is synthesized through the following reaction C7H603+C4H6O3=C9H8O4=HC2H3O2 a)Assuming the maximum yield that could be obtained is 76.8% what mass of Aspirin C9H8O4 could be obtained from this reaction when 2.00 * 10^2 grams of C7H6O3 reacts with 145.30 grams of C4H6O3...
  80. Chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 4.091×10−3 M−1s−1. What is the initial rate of reaction in a reactor filled ...
  81. chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 2.591×10−3 M−1s−1. What is the initial rate of reaction in a reactor filled ...
  82. chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 5.591×10−3 M−1s−1. What is the initial rate of reaction in a reactor filled ...
  83. Science

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 1.091×10−3 M−1s−1. What is the initial rate of reaction in a reactor filled ...
  84. chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 2.091×10−3 M−1s−1. What is the initial rate of reaction in a reactor filled ...
  85. college

    Use the following information to identify element A and compound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790 torr and a temperature of 15 C. When ...
  86. UNDERSTANDING OBSERVATION AND BEHAVIOR

    1. Which of the following scenarios would be the best example of a time when observation would be authentic assessment? A. A preschooler in the dramatic play area B. An infant on her first day of child care C. A toddler on a field trip to a local pumpkin patch D. A second ...
  87. Chemistry

    Hydrogen is generated by passing hot steam over iron, which oxidizes to form Fe3O4, in the following equation: a. if 625 g of Fe3O4 is produced in the reaction, how many moles of hydrogen are produced at the same time? b. how many moles of iron would be needed to generate 27 g...
  88. Chemistry

    Nitric oxide reacts with chlorine to form nitrosyl chloride, NOCl. Use the following data to determine the rate equation for the reaction. NO + (1/2)Cl2 -> NOCl Expt.[NO] [Cl2] Initial rate 1 0.22 0.065 0.96 M/min 2 0.66 0.065 8.6 M/min 3 0.44 0.032 1.9 M/min
  89. biochemistry

    Enzyme X is a highly pigmented protein that imparts the characteristic color to certain blue-green algae. It also facilitates a reaction necessary to the survival of this species; we can follow the kinetics of this reaction by measuring the conversion of Substance X to ...
  90. Chemistry

    I am so confused with my chemistry lab right now. We were given the following equations to work with: [Equation 1] 2 I^- + H2O2 + 2 H^+ ----> I2 + 2 H2O [Equation 9] 2S2O3^2- + I2 ----> 2I^- +S4O6^2- And During the Experiment we used the following for each reaction: T1...
  91. chemistry

    A certain first order reaction has a rate constant of 3.75x10^-2 s^-1 at 25.0C. What is the value of k at 70.0C when the activation energy is 135 kj/mol? Would I use the formula K=Ae ^-Ea/RT even though I have two temperatures?
  92. Chemistry

    My question is ..can anyone explain how to do problem #2? I feel lost. :( And could you also explain why? Problem#1, is that a regular dG = dH - TdS problem? Then using Go = -RTlnK to find K? Im just afraid if there are other seps to it.. 1. The combustion of butane has the ...
  93. Chemistry

    Which of the following general equations describes all decomposition reactions? decompo single double A 2N2O5 → O2 + 4NO2 Is what type of chemical reaction? Combustion Synthesis Decomposition None of the above. not sure Which of the following is a decomposition reaction...
  94. Chemistry

    If equal volumes of the following are combined, would they form buffered solutions? Why or why not? .1M HF and .05M NaF I'm am a bit confused about how I can figure out if these will form buffers or not, so I'd really appreciate it if someone could explain it to me. Thanks.
  95. Chemistry

    i tried to do like dis plz chk is it rite or wrong. [2(4(327) + 495 ]- [ 2(4(327) + 523 ] = -28 Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use average bond enthalpies to estimate the ...
  96. chem-help

    Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15°C. ...
  97. chemestry

    For the following reaction, 5.70 grams of hydrogen gas are mixed with excess nitrogen gas. The reaction yields 22.6 grams of ammonia. (1) What is the theoretical yield of ammonia ? ____ grams (2) What is the percent yield for this reaction ? ____ %
  98. Chemistry

    Hydrogen cyanide is produced in the following balanced reaction. 2NH3 (g) + 3O2 (g) + 2CH4 (g) → 2HCN (g) + 6H2O (g) Given the following standard heats of formation, calculate the approximate ΔH°rxn of this reaction. Substance ΔHf°(kJ/mol) NH3 -46 CH4 -75 HCN...
  99. Science (chemistry)

    Write a balanced chemical equation and state the reaction type for each of the following reactions: a.) nitrogen gas reacts with hydrogen gas forming ammonia (NH3) b.) carbonic acid breaks down to form carbon dioxide gas and water c.) aluminum foil reacts with copper II ...
  100. Chem

    Variation of the rate constant with temperature for the first-order reaction 2N2O5(g)  2N2O5(g) + O2(g) Is given in the following table. Determine graphically the activation energy for the reaction. T(K) k(s^-1) 2981.74 x 10^-5 308 6.61 x 10^-5 318 2.51 x 10^-4 328 7....
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  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100