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

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  1. chemistry

    How many grams of hydrogen are released by the reaction of 1.00 g of aluminum with excess potassium hydroxide solution assuming 100% yield
  2. Chemistry

    A reaction at 2.43 atm produces 20.0 L of a gas and evolves 75.3 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ).
  3. Chemistry

    For the reaction 4FeCl2(aq) + 3O2(g) - 2Fe2O3(s) + 4Cl2(g); how many grams of FeO3 are produced from 8.71 x 10 to the 21st power molecules of O2?? Help Please!
  4. Chemistry

    In the reaction Ca(OH)2 + 2HCL -> CaCl2 + 2H2O: How many kilograms of H2O will be produced when 0.0948 Kg of Ca(OH)2 react with excess hydrochloric acid?
  5. chem

    Please explain: 1) if MnO2 when in a fast reaction with H2O2 appear in balanced equation and 2)purpose of manganese dioxide. Thanks
  6. science

    calculate the volume of gas at STP that is produced when 1g of silver nitrate is heated. the unbalanced reaction is: AgNO3(s)=Ag(s)+NO2(g)+O2(g)
  7. Chemistry

    Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.
  8. chemistry

    What assumption did you make about the reaction of KMnO4 solution in those determinations where temp didn't change to allow k to be a constant?
  9. science

    Based on the oxidation numbers which compound is the oxidizing agent in the following reaction? 8Al + 3KClO4 ¨ 4Al2O3 + 3KCl
  10. chem

    Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)
  11. Chemistry

    . Show a chemical reaction by which hardness is added to water that also explains the formation of caves in limestone formations?
  12. chemistry

    if 15 grams of ethane gas c2h6, reacts with 128 g oxygen un a combustion reaction, how many moles of water can be produced?
  13. Chemistry

    Write the balanced equation for the neutralization reaction between H3PO4 and NaOH in aqueous solution. Phases are optional.
  14. cHEMISTRY

    What mass of AgCl(143.32g/mol) is formed from the reaction of a 0.109 M MgCl2 solution with excess AgC2H3O2?
  15. Chemistry

    20. What is the molecular formula for alkane, alkenes and alkynes? 15.What happens to a reaction at equilibrium when more reactant is added to the system?
  16. Chemistry

    Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 K Cr*** O S
  17. science

    identify the type of reaction when hydrogen sulphide gas burns in oxygen to give water and sulphur dioxide
  18. Chemistry

    For the reaction shown, calculate how many grams of oxygen form when each of the following completely reacts. 2HgO(s)→2Hg(l)+O2(g)
  19. Chemistry

    What substance is acting as the Brønsted-Lowry base in the forward reaction below? H2O + NH3 yields NH4+ + OH-
  20. Chemistry

    Write a net ionic equation for the reaction that occurs when cobalt(II) carbonate (s) and excess hydroiodic acid are combined.
  21. PIMACOMMUNITY COLLEG

    WRITE THE NET IONIC EQUATION INCLUDING the phases for the reaction of the Hclo2+Naoh--------->H2o+Naclo2
  22. Chemistry

    Reaction between ethyl acetate and water attain equilibrium in an open vessel but decomposition of caco3 does not.explain.
  23. chemistry

    What is the ∆G for the following reaction between O3 and O2? 3O2(g) 2O3(g) Given: O3: ∆H = 285.4 kJ ∆S = -137.14 J/K) 109.5 kJ 208.3 kJ 300.2 kJ 326.3 kJ
  24. science

    I'm doing an assignment on burning magnesium and one of the questions is explain the reaction using the Big Idea of Energy. What does this mean?
  25. Chemistry

    Write out a balanced chemical equation to show the dissociation reaction of magnesium carbonate in distilled water
  26. chemistry

    Read the scenario. Hydrogen chloride (HCl) and potassium hydroxide (NaOH) react. What products are formed from this reaction?
  27. Chemistry

    Write a net ionic equation for the reaction that occurs when excess hydrobromic acid (aq) and sodium sulfide are combined.
  28. Chem

    The half-life of a first-order drug degradation reaction is 48hrs. Calculate the rate constant. Thx!!!
  29. chem

    Consider the reaction when aqueous solutions of sodium nitrate and ammonium sulfide are combined. net ionic equation?
  30. Chemistry

    How much work (in J) is involved in a chemical reaction if the volume decreases from 5.00 to 1.26 L against a constant pressure of 0.857 atm?
  31. ELA

    In "a days wait", how can the fathers reaction to his sons concern best be describe? A. Impatient B. Anger C. Frustrated D. Understanding
  32. Food Chemistry

    A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4°C to a final temperature of 65°C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85°C. Calculate the ...
  33. help physcis

    At what cold-reservoir temperature (in degree C) would a Carnot engine with a hot-reservoir temperature of 350degree C have an efficiency of 70%?
  34. Chemistry

    When 50.0mL of 0.100M NH3 (Kb=1.8x10^-5) solution is mixed with 20.0mL of of 0.250M HCl solution, what is the pH after reaction? I solved the ka=5.56x10^-10 and I solved the moles of each nHCl and nNH3 and both have 0.005 moles. What do I do after this? Thanks.
  35. Chemistry

    When 50.0mL of 0.100M NH3 (Kb=1.8x10^-5) solution is mixed with 20.0mL of of 0.250M HCl solution, what is the pH after reaction? I solved the ka=5.56x10^-10 and I solved the moles of each nHCl and nNH3 and both have 0.005 moles. What do I do after this?
  36. Physics

    At a chemical plant where you are an engineer, a tank contains an unknown liquid. You must determine the liquids specific heat capacity. You put 0.500 kg of the liquid into an insulated metal cup of mass 0.200 kg. Initially the liquid and cup are at 20 ∘C. You add 0.500 kg ...
  37. english II

    Error in Sentence Consistency and Parallelism. the answer is d. A.First prepare a résumé; then write your cover letter. B.An autocratic leader makes all decisions and then tells subordinates what to do and how to do it. C.If you have an eye for detail and an ear for language...
  38. Math_ Intergers

    On Tuesday the temperature changes -2 degrees F perhour from noon until10:00a.m. the next morning. The temperature at noon on Tuesday is 75 degrees F. A) What is the Temperature at 4:00 p.m on Tuesday? B)What is the temperature at 9:00 a.m. on Wednesday? c)Plot the (time, ...
  39. Chemistry

    EQUILIBRIUM: To prepare the standard solution, a very large concentration of ferric ion is added to a small initial concentration of thiocyanate ion. True or False It would help if we knew what you were doing. We are determining Chemical Equilibrium: Finding a Constant Kc... ...
  40. Phase

    http://en.wikipedia.org/wiki/Melting_point Question: A solid substance has a vapor pressure of 100 mmHg at the melting point (100C). Assuming an atmospheric pressure of 760 mmHg, describe the behavior of this solid as the temperature is raised from room temperature to its ...
  41. Physics (12th Grade)

    Equal volumes of monoatomic and diatomic gases of same initial temperature and pressure are mixed.What will be the ratio of sprcific heats of the mixture(Cp/Cv)?
  42. Chemistry

    Calculate the volume of natural gas (methane) required to bring 3.9 L of water to a boil. Assume the initial temperature of the water is 39 C, and the methane is at 1 bar and 25 C. Assume that methane is an ideal gas, the specific heat capacity of water to be constant and ...
  43. Chemistry

    A scuba diver 60 ft below the ocean surface inhales 55.0 mL of compressed air from a scuba tank at an initial pressure of 2.60 atm and temperature of 8 ∘C. What is the final pressure of air, in atmo-spheres, in the lungs when the gas expands to 155.0 mL at a body ...
  44. AP Chemistry

    1) Calculate the volume of air at 30 degrees C and 1.00 atm that is needed to burn completely 10.0 grams of propane. Assume that air is 21.0 percent O2 by volume. 2) Assuming all of the heat evolved in burning 30.0 g of propane is transferred to 8.00 kg of water (specific heat...
  45. Research writing

    1. A blowout, or a flat tire that occurs suddenly while you are driving, can be frightening. sudden suddenly -------------------------------------------------------------------------------- 2. Blowouts happen less frequent than they used to. frequently frequent...
  46. Chemistry

    If you have a 578 g of fat (tristearin) stored in your body, how much heat will be produced when it is metabolized? tristearin is C57H110O6 The chemical reaction: C57H110O6(s) + O2(g) --> CO2(g) + H2O (l) DHf: C57H110O6(s) -390.70 O2(g) 0 CO2(g) -393.5 H2O(l) -285.840 I don...
  47. Chemistry(Please respond)

    A study of the system, H2(g) + I2(g) == 2 HI(g), was carried out. Kc = 54.9 at 699.0 K (Kelvin) for this reaction. A system was charged with 2.50 moles of HI in a 5.00 liter vessel as the only component initially. The system was brought up to 699.0 K and allowed to reach ...
  48. physics

    An ideal gas is in equilibrium at initial state with temperature T=137oC, pressure P = 0.75Pa and volume V = 0.75 m3. If there is a change in state in which the gas undergoes an isothermal process to a final state of equilibrium during which the volume is doubled. Calculate ...
  49. Algebra 1

    The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (write the equation as a function)
  50. Motion equation

    I assume that is 5.5 m/s, the initial velocity. Ok, assuming that, then you know the initial KEnergy; 1/2 .62 (5.5)^2 joules. At the max height, the KE you are given is KE from horizontal motion. So subtract that amount (2.3J) from the initial KE, and you have then the KE that...
  51. Chemistry

    If all of the SCN- was not converted completely converted to FeNCS^2+ when the calibration curve was prepared, would this raise or lower the value of Keq? Explain
  52. Chemistry

    Please rank the following compounds in DECREASING order of their reactivity toward the SN2 reaction with sodium ethoxide in ethanol. a. methyl chloride (CH3Cl) b. isopropylbromide ((CH3)2CHBr) c. t-butyliodide (CH3)3Cl) d. methyl iodide (CH3I) e. ethyl chloride (CH3CH2Cl) I ...
  53. Chemistry

    A researcher is studying the decomposition of A as shown by the general reaction below: 2 A(g) 4 B(g) + 2 C(g) Initially, the scientist fills an evacuated 1.772 L flask with 3.710 x 10-1 moles of species A. Upon equilibrium, it is determined that the concentration of A is 4....
  54. Social Studies

    1. What was the landscape of the country prior to Imperialism? 2. What kind of resources made the country a commodity to the colonizers? 2. Who lived there? What was their daily life like? 4. What kind of leadership and hierarchy did the civilization follow? 3. When did ...
  55. College Chemistry

    A buffer solution contains 0.120M acetic acid and 0.150M sodium acetate. a. How many moles of acetic acid and sodium acetate are present in 50.0 ml of solution? b. if we add 5.55 mL of 0.092M NaOH to the solution in part (a) how many moles of acetic acid , sodium acetate, and ...
  56. COM

    A piece of iron has a temperature of 0 zero degrees Celsius. At what temperature would the iron atoms have twice as much kinetic energy?
  57. To Dr.Bob

    The problem you helped me with: A liter of a solution saturated at 25 deg C with calcium oxalate, CaC2O4 is evaporated to dryness, giving a .0061 gm residue of CaC2)4. Calculate the concentrations of the inons, and the molar solubility and the solubility product constant for ...
  58. science

    Numbers 1-9 are true and false questions.Check if my answers are right and if I didn't write anything on the blank, I need help with them. Thanks!!!! _____ 1. Velocity could be reported as 50 k/hr. True 2. How far an object travels in a certain period of time is its speed. ...
  59. Chemistry

    A plasma reaction converts A (Molecular weight = 200) to B and uses NAD as a co-substrate and produces NADH as a by product (1 mole of NADH is produced per every 1 mole of A converted to B). The amount of NADH can be determined by monitoring its’ absorbance at 340nm in a ...
  60. chemistry

    When carbon dioxide is heated in a closed container, it decomposes into carbon monoxide and oxygen according to the following equilibrium equation: 2CO2(g) ---> 2CO(g) + O2(g) When 2.0 mol of CO2(g) is placed in a 5.0-L closed container andheated to a particular temperature...
  61. chemistry

    A sample of benzoic acid weighting 1.567 g was burned in a calorimeter. If the initial temperature was 22 degrees Celsius,the final temperature was 31.1 degrees celsius, and the heat capacity of the calorimeter was 4.88 kJ/ degrees Celsius, what is the heat of combustion of ...
  62. Art

    An Asian sculptor creates an image of the Buddha for the local temple. The artist’s primary responsibility is to A. self: as long as he does his best, that’s all that matters. B. Buddha: he must work hard to please this revered leader. C. future tourists: he must make sure...
  63. Chemistry

    I have this question and I am pretty sure on what to use to solve it but I am just stuck. The reaction of 8 g of hydrogen and 28 g of carbon monoxide gave 16 g of methanol. What was the theoretical yield if the percent yield was 50%? actual yield ________________ X 100% = ...
  64. Chemistry-

    PCl5 (g) <=> PCl3 (g) +Cl2 what is the property that might be observed in order to determine when equlibrium has been reached? The question is a little vague. Is the property visual or some other property? I don't think vision (color) will work for PCl5 is a yellowish ...
  65. HELP

    A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100°C and a cold temperature of 10.0°C. The coefficient of thermal conductivities of the brass and the aluminum are ...
  66. Chemistry

    The equilibrium constant for the reaction 2SO2 + O2 <=> 2SO3(all are gases) at a certain const temperature is 846.4mol/dm^3. At equilibrium in a 1dm^3 vessel, 0.5 moles of SO2, 0.1 moles of O2, and 4.6 moles of SO3 were found. How many moles of oxygen must be added to ...
  67. physics

    for this question A bullet is fired from a rifle that is held 1.8 m above the ground in a horizontal position. The initial speed of the bullet is 1120 m/s. Find why is the equation just (.5)(9.8)(t^2)=1.8 why don't we have to take in account for initial velocity: (.5)(a)(T^2...
  68. physics

    if a piece of aluminum with mass 3.99g and a temperature of 100C are dropped into 10cm^3 of water at 21C, what will be the final temperature of the system? The specific heat of aluminium is .900J/gC... ok so i know that i set both equal to each other, but i was wondering do i ...
  69. Math

    An object is heated to 90 degrees Celcius and is then allowed to cool in a room whose air temperature is 25 degrees celcius. If the temperature of the object is 75 degrees celcius after 10 minutes, when will its temperature be 50 degrees celcius? I have no idea how to do this...
  70. Math

    An object is heated to 90 degrees Celcius and is then allowed to cool in a room whose air temperature is 25 degrees celcius. If the temperature of the object is 75 degrees celcius after 10 minutes, when will its temperature be 50 degrees celcius? I have no idea how to do this...
  71. Psy 210

    The following table describes five situations in which a person reacts to stress in an unhealthy manner. For each: a. identify the stressor(s). b. briefly explain why the person's reaction is an unhealthy choice. c. briefly describe one healthy alternative way of reacting and ...
  72. chemistry

    continued from before.... the question was what are three chemical characteristics and ten physical characteristics so then would i have to say something like -when iron rusts or -sugar burns or something like that i was thinking that would just be a chemical reaction not a ...
  73. Chemistry

    Are my answers correct? C6H14 + 19/2 O2 -> 6 CO2 + 7H2O enthalpy change = -4163 kJ a) if 0.537 mol of carbon dioxide is produced in the reaction represented by the equation above, how much heat is released by the reaction? Enthalpy change = 0.537 mol CO2 x -4163kJ/6 mol CO2...
  74. Trigonometry

    Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the high temperature of 95 degrees occurs at 3 PM and the average temperature for the day is 80 degrees. Find the temperature, to the nearest degree, at 8 AM
  75. math

    a weather forecaster predicts that the temperature will drop 3 degrees each hour for the next 9 hours. If the temperature is 7 degrees farenheit before the temperature starts falling, what is the temperature after the drop?
  76. Chemistry

    Questions: 1. In each test tube, a precipitate formed upon DROPWISE addition of the second reagent (steps 5 and 6). What are these precipitates? (a) First test tube with HgCl©ü : (b) Second test tube with SnCl©ü : 2. In each test tube, which reagent was limiting and which ...
  77. Chemistry

    Dear Sir DrBob22 Thank you for your response we have an oil well. the well column has been completed (filled up) with completion fluid of gasoline. we want to stimulate the well by 28% HCL. if 28% HCL is to be injected into the the well column, whether a chemical reaction will...
  78. calculus 1

    the average temperature in Hartford can be expressed as t = f(m) where m is month (January = 1, etc.) and t is the average daily high temperature for the month in degrees F. 1) what is the meaning of f'(m)? rate of change of the average temperature (in degrees F) as the month ...
  79. Physics

    Of the following materials, sound waves travel fastest through...? Helium at room temperature Air at room temperature Water at room temperature Steel at room temperature
  80. chemistry concentrations

    You have combined the following: 7.92mL of 1.122M Fe(NO3)3(aq), 5.02mL of 1.849M NaCl(aq), and 7.09mL of water. What is the concentration of chloride ions in the resulting solution? Assume liquid volumes are additive
  81. Chemistry

    An ideal gas with an initial volume of 2.30L is cooled to 12.00 Celsius where its final volume is 1.85L. What was the temperature initially?
  82. Physics

    How much heat must be added to 30 g of water at an initial temperature of 62°C to completely convert the 100°C water to steam?
  83. physcical science

    how much heat is needed to warm 200 grams of water from an initial temperature 24 celsius to 84 celsius
  84. Statistics

    Assume the body temperature of healthy adults are normally distributed with a mean of 98.2 degrees F and a standard deviation of .62 degrees F. If you have a temperature of 99.0 what is your percentile score?
  85. Chemistry

    A sample of argon has a pressure of 1.021 atm at a temperature of 89.4 degC. Assuming that the volume is constant, at what temperature will the gas have a pressure of 1016.56 mmHg
  86. Chemistry

    A sample of argon has a pressure of 1.021 atm at a temperature of 89.4 degC. Assuming that the volume is constant, at what temperature will the gas have a pressure of 1016.56 mmHg
  87. Chemistry PLEASE HELP!!

    Questions: 1. In each test tube, a precipitate formed upon DROPWISE addition of the second reagent (steps 5 and 6). What are these precipitates? (a) First test tube with HgCl©ü : (b) Second test tube with SnCl©ü : 2. In each test tube, which reagent was limiting and which ...
  88. Chemistry

    How do you write the combination of: Na2CO3 AgNO3 (CO3 -2) and (Ag=1) Thanks! This is a double displacement reaction. silver carbonate and sodum nitrate form.
  89. chemistry

    I need the equilibrium constant for the following reaction @ 25 deg. C 2CaCO3 (calcite) + Mg2+ <==> CaMg(CO3)2 (dolomite) + Ca2+
  90. Chemistry

    The first order reaction has a rate constant of 3.0x10^-3 s^-1. The time required for the r eaction to be 75% complete is: 95.8s 201s 231s 462s 41.7s
  91. chemistry 12

    what is the chemical formula for the reaction between lead acetate and potassium iodide? please show both reactants and products. :)
  92. chemistry

    Whatis the chemical name of the substance formed in the slow reaction that takes place when iron filings are mixed with water?
  93. chemistry

    What is delta Hrxm dagrees for the following chemical reaction? CO2(g)+2KOH(s) = H2O(g)+K2CO3(s) Express your answer in numerically, in kJ
  94. O-CHEM

    Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each
  95. Chemistry

    Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each
  96. Ochem Lab

    Suggest an appropriate reducing reagents for the following substrates and predict the reaction:(1) 2-hexanone, (2)ethyl 4-nitrobenzoate, (3) hexanal
  97. Organic Chemistry

    The E1 elimination reaction proceeds through a _________ . A. concerted process B. carbocation intermediate C. polarized transition state
  98. chem

    how would I do the elimination reaction of 2-chloropentane. When I figured it out I got the products as being 1-pentene and hydrogen chloride. Is this correct?
  99. chem

    6FeO3----->4Fe304+02 DELTA H=+ 392kj If 2.83 g of Fe2O3 decomposed according to the above reaction , how many kj of heat would be exchanged with the enviroment?
  100. Chemistry

    How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.65 g of Na with H2O? 2Na+2H2O ---> 2NaOH + 2H2 Delta H= -368.4
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