For the reaction H2(g) + I2(g) ↔ 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial

106,288 results, page 55

  1. gen.science

    A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. Which chemical or element will have the largest number of moecules?
  2. chemistry

    The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which one of the following ...
  3. Chemistry please help

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one mole of diamond C(...
  4. Chemistry please help!

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one mole of diamond C(...
  5. CHEM

    1. How many moles of water can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? What is the limiting reagent? 2. Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the limiting reagent? 3. The burning of 18.0 g of ...
  6. Chemistry

    Suppose that 50.0 mL of a 0.250 M HCl solution is mixed with 50.0 mL of a 0.100 M Ba(OH)2 solution in a coffee-cup calorimeter. The temperature of the resulting solution increases by 1.76 oC . Calculate DH for the reaction between HCl (aq) and Ba(OH)2 (aq) in kJ per mole of Ba...
  7. Chemistry

    What is the molarity of Cu2+ in a catalyzed reaction using 3 drops of CuSO4 at .03M in 50.0ml, and what is the molarity of Cu2+ using 6 drops? (Consider the extent of dilution of the 0.1 M CuSO4 solution in preparing the 50 mL reaction solution. Estimate 20 drops/mL.) My Work...
  8. Biology

    Cellular Respiration and Photosynthesis co-exist as paired metabolic processes. Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced as a by product during...
  9. Chemistry

    Question: you have a clear, colorless aqueous sample in a beaker that contains either CO2^-2(aq) or C^-1(aq) or a mixture of both ions. the following aqueous reagents are available: NaCl, HNO3, and AgNO3. describe a procedure that will allow the determination of which of the ...
  10. Physics

    A lead ball, with an initial temperature of 25.0oC, is released from a height of 96.0 m. It does not bounce when it hits a hard surface. Assume all the energy of the fall goes into heating the lead. Find the temperature (in degrees C) of the ball after it hits. Data: clead = ...
  11. chemistry

    NH4NO3(s) + H2O(l) NH4NO3(aq) ΔH = +25.7 kJ What is the final temperature in a squeezed cold pack that contains 40.0 g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18 J/(g·°C) for the solution, an initial temperature of 25.0°C, and no heat ...
  12. Chemistry

    Hello I have a question about a reaction. I have to give the final products of mixed copper (II) sulfate, sodium chloride and finally copper. My teacher told me that it is formed a copper chloride, but which of the two that exists? And how would it be the equations for the ...
  13. chemistry

    Can anyone help me with these Chemistry questions? I am trying to study for an upcoming test and its just not sinking in as well and I thought. This is Thermochem for a heads up: Suppose 33mL of 1.20M HCl is added to 42mL of a solution containing excess sodium hydroxide in a ...
  14. CHEMISTRY

    I have these equations in our book , but I've tried a few times to solve it in half reaction method , but I couldn't yet : 1) KMnO4 + KIO3 => MnO2 + KIO4 ( in a basic solution ) 2) MnO4- + Cl- => Mn^+2 + HClO ( in a acidic solution ) I think these are incorrect , but I ...
  15. AP Chemistry

    1. Equilibrium 2SO3(g) <--> O2(g) + 2SO2(g) A 3.21g sample of sulfur trioxide is placed in a 2.25 L cylinder and allowed to reach equilibrium at a constant temperature of 500 , as shown in the above equation. Analysis shows 1.23 X 10^-2 mol of sulfur dioxide at ...
  16. Physics help please!

    The pressure of a fixed quantity of an ideal gas was held constant. The initial volume was 8.00 cubic meters and the final volume was 2.50 cubic meters. What was the final temperature in kelvins if the initial temerature was 188 degrees fahrenheit... Please walk me through ...
  17. CHEM.

    1. a) What species are present in a 3.0 M NH3 solution? b) Qualitatively, what is the pH of this solution? c) What reaction(s) might occur when this solution is added to a solution containing Mn2+? d) What effect will adding HNO3 to the solution from part c have? Write any ...
  18. History

    How should I start my reaction essay off? I looked up examples online and most sources say to state the title and the author but I'm not sure how to "form" the first paragraph. This is what I have so far.. After reading the article Survivors, I felt horrified, disgusted and ...
  19. Chemistry

    Calculate the ΔHrxn for the following reactions using the heats of formation given in the table at the end of this assignment: a)The complete combustion of methane, CH4, producing water as a liquid. b)The complete combustion of glucose, C6H12O6, producing water as a ...
  20. Physics

    When calculating delta Tsample,why is th initial temperature taken to be 100 degrees Celsius
  21. physical science

    How many kilojoules are required to melt 5 lbs of gold if its initial temperature is 1000 K?
  22. Kainantu sec..science(chemistry)

    How many moles of O2 are there in the above sample at the initial temperature and pressure?
  23. Science

    When calculating delta Tsample,why is th initial temperature taken to be 100 degrees Celsius
  24. Chemistry

    Hey i have an idea how to do this but am not sure could you please help and show work. 12 moles of a gas sample at an initial temperature of 12 degrees celcius at a pressure of 200 Pa is allowed to expand isothermally and reversibly against a pressure of 50 kPa. Calculate the ...
  25. math

    (TEMPERATURE CHANGE) The rate at which the temperature of an object changes is proportional to the difference between its own temperature and the temperature of the surrounding medium. Express this rate as a function of the temperature of the object
  26. chem

    Consider the reaction that occurs on mixing 50.0 mL of 0.560 MNaHCO3 and 50.0 mL of 0.400 M NaOH at25oC. (a) Write a balanced net ionic equation for thereaction. (b) What is the pH of the resulting solution? (c) How much heat (in joules) is liberated by thereaction? (standard ...
  27. chemistry

    How could you make the reaction Cu(NO3)2 + NaCO3 -- CuCo3+NaNO3 balanced? You have the formula for sodium carbonate wrong> Na2CO3 The carbonate ion is -2 valence, and Na is +1. Now it will balance.
  28. chemistry

    Suppose you tried to combine 42 grams of magnesium with 42 grams of oxygen. Which of the two substances would have some left after the reaction and how much magnesium oxide would be formed?
  29. Chemistry

    refer to the reaction: 2Mg+O2->2MgO. complete the ICE table 2Mg+ O2 2MgO I 1.25g 25.0g 0g C ? ? ? E ? ? ? I am so lost on the table I have refered to my notes but they are not making any sense. I would really appreciate any help!!
  30. Chemistry

    I have a solution made up of 100 ml of distilled water and 2.0g of NaOH. I need to determine the total volumeof the solution in order to the calculate the mass of the reaction mixture. How do I do this? We are to assume the density of the solution is the same as pure water, 1....
  31. AP Chemistry

    For the reaction NH3+? O2 →? NO+? H2O , what is the maximum amount of NO (30.0061 g/mol) which could be formed from 3.79 g of NH3 (17.0305 g/mol) and 18.63 g of O2 (31.9988 g/mol)? Answer in units of g -My first thought was to balance the equation, but I have no idea ...
  32. Chemistry

    In this reaction: 2 HCl + Na2CO3 -> H2O + CO2 + 2 NaCl The HCl was diluted from 2M to 0.8M and I currently have 0.020 L of it. There is also Na2CO3. What would be four causes for a large error percentage? Is it possible that some of the HCl evaporated?
  33. Hayden

    Chloroacetic acid has a relatively large equilibrium constant, so at low acid concentrations it is necessary to use the quadratic equation in order to calculate the concentrations of the aqueous species. Ka for ClCH2COOH is 1.4 ´ 10-3. For the problems that follow, consider ...
  34. Physical Science

    Can someone check if these are right: Tell reaction rate 1.) one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. TEMPERATURE? 2.) a mixture of baking powder, flour, sugar, and eggs is placed in the oven. TEMPERATURE? 3...
  35. Physical Science HELP

    Can someone check if these are right: Tell reaction rate 1.) one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. TEMPERATURE? 2.) a mixture of baking powder, flour, sugar, and eggs is placed in the oven. TEMPERATURE? 3...
  36. Chemistry

    In the following experiment, a coffee-cup calorimeter containing 100. mL of H2O is used. The initial temperature of the calorimeter is 23.0 degrees C. If 3.80 g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The ...
  37. Organic Chemistry

    Procedure: 1) Accurately weigh approximately 0.40 g of Dimethyl maleate into a 50 mL round bottom flask that possesses a ground glass joint, and record the weight. 2) Dissolve the Dimethyl maleate in 10 mL of methanol, and add approximately 5 drops of 10percent solution (w/v) ...
  38. Chemistry

    Thioacetoamide decomposes in hot water to produce hydrogen sulfide, which is the active reactant in the first step of this reaction. write balanced equation of thioacetoamide in water. Does what I have below make sense? C2H5NS + H2O ----> H2S + C2H3NO
  39. Chemistry

    Determine the cell potential from the following half cells: Pb^o/Pb2+ and ZN^O/Zn2+ whre [Pb2+]=.86Mand [Zn2+]=0.35M Calculate K for this reaction. How long in hours would you have to let it go until you lower the voltage to 95 percent of the E from the Nernst equation at 7.2?
  40. chemistry

    A block of copper of unknown mass has an initial temperature of 66.7 ∘ C . The copper is immersed in a beaker containing 95.5g of water at 20.6 ∘ C . When the two substances reach thermal equilibrium, the final temperature is 26.0 ∘ C .What is the mass of the...
  41. Chemistry

    Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.114 g of Zn(s) is combined with enough HCl to make 51.1 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the ...
  42. Rate Constants

    I'm really stuck with this one. Here's the rate law and the data that is needed. I appreciate any help Rate= k[I2]X{[H+]Y[CH3COCH3]Z Trial Volume of 0.0010 M I2 Volume of 0.050 M HCl Volume of 1.0 M acetone Volume of water Temperature (degrees C) Reaction time A 5.0 10.0 10.0 ...
  43. Chemistry

    CH4 (g)+ H2O (g) --->/<---- 3H2 + CO Use Le Chateliers Principle to explain what will happen to the number of moles of hydrogen at equilibrium when a) CO is removed b) Water Vapor is removed c) Methane is added d) CO is added e) Pressure is increased by adding argon gas...
  44. Chemistry

    CH4 (g)+ H2O (g) --->/<---- 3H2 + CO Use Le Chateliers Principle to explain what will happen to the number of moles of hydrogen at equilibrium when a) CO is removed b) Water Vapor is removed c) Methane is added d) CO is added e) Pressure is increased by adding argon gas...
  45. bio

    You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl
  46. Chemistry

    please explain how % error and % yield would have effected the mass/moles of a substance in a reaction in a lab. In this case mass/moles of NaCl. NaHCO3+ HCl--> NaCl + CO2 + H2O
  47. Chemistry

    Trying to wrap my head around this, thanks for the help: You have 8.63 moles of C2H6O2 in the following unbalanced equation: (I already balanced it, here is the balanced): C2H6O2 + 5 O2 → 4 CO2 + 6 H2O How many moles of water are produced in this reaction?
  48. Chemistry(Please Respond)

    Willsomeone, please check my answers? (<-----) indicates my answer. 1.A student increases the temperature of a 556 cm³ balloon from 278 K to 308 K. Assuming constant pressure, what should the new volume of the balloon be? 320 cm3 501 cm3 1232 cm3 616 cm3<------ 2. Which...
  49. CHemistry

    Research the role of chemistry within a specific industry. Identify chemical processes upon which the industry relies. Explore environmental impacts of the industry that are related either to the chemicals it uses or produces. Procedure Choose one of the industries listed ...
  50. Science

    1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sun’s radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) ...
  51. PHYSICS

    1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sun’s radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) ...
  52. biology

    what is the chemical reaction that produces a polymer form of a biomolecule?
  53. Chemistry

    What are the five(5) indications that show that a reaction has taken place? Thanks
  54. Bio lab question 2

    What does adding an acid to an enzyme do to a reaction?
  55. science

    write the balaced half-reaction for the conversion of Fe(s) to Fe2+(aq)
  56. chemistry

    write the balanced half reaction for the conversion of Cl2(g)to Cl-(aq)
  57. chemistry

    what type of reaction is 2KCLO3+heat-2KCL+3O2
  58. chemistry

    The equation Mg(s) 2HCl(aq)---MgCl2 (aq) H2(g) is an example of which type of reaction?
  59. chemistry

    reaction between iron fillings and su lphur will form
  60. Science: Chemistry

    Indentify the products of the following reaction: Al + NaOH -> ?
  61. US history

    what was the parliament's reaction to the Boston Tea Party of 1773 ?
  62. science

    what is the difference between a chemical reaction and physical separation.
  63. science

    how the particals behave in the reaction between iron and suiphur
  64. AP Chemistry

    What is the redox reaction of (i don't understand how to do this): MnO4-(aq) + H2O2(aq) -> Mn2+(aq) + O2(g)
  65. economics

    can one determine that a project was successful by the customers reaction?
  66. 12th grade

    5 factors that affect the rate of a chemical reaction
  67. English

    Contrat the reaction of Hamlet, Laertes to their father's death.
  68. organic chemistry

    how do you increase the yield of triphenylmethanol in a grignard reaction?
  69. organic chemistry

    how do you increase the yield of triphenylmethanol in a grignard reaction?
  70. Chemistry

    Classify each reaction and balance the equations. Al(OH)3 ==> Al2O3 + H2O
  71. chemistry

    classify each reaction and balance the equation Al(OH)3--> Al2O3 + H2O
  72. chemistry

    G naught doesnt tell you whether the reaction is spontaneous or not
  73. chemistry

    n the reaction 2CO(g) + O2(g) ® 2CO2(g) what is the correct expression of the rate?
  74. Chemistry

    NH4+ + OH- NH3 + H2O What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
  75. Chemistry

    H- + C6H5CH2COOH = H2O + C6H5CH2COO- What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
  76. Chemistry

    OH- + C6H5CH2COOH H2O + C6H5CH2COO- What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
  77. chemistry

    If a reaction mixture contains 28 of , 150 of , and 36 of , what is the limiting reactant?
  78. Chemistry

    What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?
  79. chemistry

    how can AgCl(s) be dissolved completely? write an equation for the reaction
  80. Chem

    What is the enthalpy for the following reaction? C2H4+H2O--->C2H5OH
  81. chem

    is An antacid neutralizes stomach acid. a chemical reaction?
  82. Chemistry

    How many grams of Ni(OH)2 are produced from the reaction of 45.0mL of 1.75 M NaOH solution?
  83. chemistry

    equation of the reaction of hydrochloric acid and iron sulphide
  84. college chemistry

    How many grams of Mg(OH)2 can be prepared from the reaction of 20.0g of Mg3N2 with 10.0g of H2O?
  85. Chemistry

    What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)
  86. Chemistry

    What is the rate law of the reaction 2NO2 gives N2O4?
  87. science

    what is the difference between a physical change and a chemical reaction
  88. chemistry

    What are the products of a reaction between NaCl, HNO3, and AgNO3?
  89. Chemistry

    what is the equation for the reaction of Cu(NH3)subscript2(SO4) with NaOH?
  90. chemistry

    given reaction at equilibrium, if Kp=1.05 at 250 degree celcius, then kc =
  91. Science

    Write a mechanism for the aldol reaction of 3,3-dimethyl-2-butanone.
  92. Chem4

    For the reaction A + 1/2 B --> 2 C, when C is increasing at a rate of 0.018 M/s, how fast is B decreasing?
  93. apchem

    can someone explain the synthesis reaction from ethane to acetylene?
  94. Chemistry

    Consider the reaction: N2(g) + 3H2(g) ¡ú 2NH3(g) question: calculate ¦¤S¡ã in J¡¤K-1.
  95. science

    Is an icing propane regulator concidered an endothermic reaction?
  96. chemistry

    what is the following reaction? HNO3(aq) + KOH(aq) ---> KNO3(aq) + H2O(l)
  97. Chem 1411

    Predict the product in the combination reaction below. Al(s) + N2(g)
  98. chemistry

    what is the equation of the reaction between potassium sulphite and bromine
  99. biology

    an organism's reaction to a change in its intenal or external enviroment
  100. chemistry

    give the state symbols of the reaction: 2H2 +O2 =2H2O
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