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. english- final revision

    In the first argument, the writer is trying to establish a plausible argument on catastrophic events, such as the 911 attacks on the World Trade Center, and how we as Americans are more susceptible to react with rage, when an event of this magnitude hits closer to home. ...
  2. chemistry

    So the question I have is: Calculate the pressure of dry hydrogen collected. (Use the water temperature). And the evidence that we obtained was: Length of magnesium 3.8Cm Mass of 1 m of magnesium 1.254g Volume of hydrogen collected 67mL Air temperature 27C Water temperature ...
  3. Physics

    Imagine that your car is powered by a fusion engine in which the following reaction occurs. 3*deuterium--->helium + hydrogen + neutron The masses are (2.0141 u), (4.0026 u), (1.0078 u) and (1.0087 u). The engine uses 8.1 10-6 kg of deuterium fuel. If one gallon of gasoline ...
  4. Chemistry

    In this equilibrium H2(g) + I2(g) <-> 2 HI(g). What is happening on the molecular level? Like given the right energy when a H2 molecule hits a I2, is electron transfered and they just stick together? Or do they have to be in the right position? Who transfers (or is it ...
  5. Psych 230

    What influence does culture have on personality? Do you see a persons reaction to something as separate from social experience or as a result of social experience? Which one of the four positions of the nature of traits do you agree with most and why? Compare and contrast your...
  6. Motion equation

    A stone, which weighs 0.62kg, is thrown, at 5.5ms, its kinetic energy at its maximum height above the surface is 2.3J, what is the height of the stone at this point? Any eqautions or advice gratefully received. I assume that is 5.5 m/s, the initial velocity. Ok, assuming that...
  7. Chemistry please help!

    What happens to the following reaction at equilibrium if the pressure is decreased? 2H2(g) + O2(g) 2H2O(g) A. The equilibrium shifts left because Q > K. B. The equilibrium shifts right because Q < K. C. The equilibrium shifts left because Q < K. D. The equilibrium ...
  8. Chemistry

    a balloon has a volume of 2.0 L at room temperature (27 degrees celsius). at what temperature would the balloon have a volume of 2.0L?
  9. calculus

    The differential equation below models the temperature of a 87°C cup of coffee in a 17°C room, where it is known that the coffee cools at a rate of 1°C per minute when its temperature is 67°C. Solve the differential equation to find an expression for the temperature of the...
  10. physics

    When an immersion glass thermometer is used to measure the temperature of a liquid, the temperature reading will be affected by an error due to heat transfer between the liquid and the thermometer. Suppose you want to measure the temperature of 7 mL of water in a Pyrex glass ...
  11. Chemistry

    Consider the following equilibrium: 2HI(g) *are in equilibrium with* H2(g) = I2(g) Keq = 81.0 A 2.00L container is initially filled with 4.00 mol HI. Calculate the [HI] at equilibrium. *I don't know how to put the equilibrium sign on the computer* Can someone please explain to...
  12. science

    Part I: Units of Measurement for Gas Laws For the following questions, use the following answer choices to indicate what each unit of measurement is used to measure (pressure, volume, or temperature). 1. atm 2. kPa 3. L 4. oC 5. torr 6. K 7. mL 8. cubic centimeters (cm3) ...
  13. Chemistry

    Hello, So I have recently done a lab with cobalt(II) nitrate and NaOCl (bleach) and our objective was to determine if colbalt or the bleach is part of the rate determining step. With the lab we have done trials by diluting the colbalt and leaving the concentration of bleach ...
  14. college physics

    An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 400-g sample of silver at an initial temperature of 87°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. ...
  15. AP Chemistry

    How can you find the average temperature of a refrigerator or any fridge by using colligative properties?? I am doing a lab in school and i'm not sure how to approach or start this. I know that you have to have two solutions where on one solution, you put a tremendous amount ...
  16. chemistry

    To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
  17. chemistry

    To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
  18. chemistry

    To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
  19. chemistry(check my work)

    The initial concentration for the compounds involved in the reaction shown were determined to be [CS2(g)] = 1.075 mol/L, [H2(g)] = 1.436 mol/L, [CH4(g)] = 0.6740 mol/L, [H2S(g)] = 0.3120 mol/L. Calculate the value of the equilibrium constant (Kc) at 1175 K if the equilibrium ...
  20. science

    A thermally insulated 50 ohm resistor carries a current of 1 A for 1 s. The initial temperature of the resistor is 10 degree Celsius, its mass is 5 g, its specific heat capacity is 850. What is the change in entropy of the resistor?
  21. Honors Chemistry (stoichiometry)

    Can someone check and make sure I'm doing these problems right? Thanks so much!! 1. N2 + 3H2 ==> 2NH3 : How many moles of hydrogen are needed to completely react with two moles of nitrogen? ==> I got 6 moles. 3. Zn + 2HCl ==> ZnCl2 + H2 : How many moles of hydrogen ...
  22. satp conditions

    Calcium hydride reacts with a vast excess of water to form calcium hydroxide and hydrogen gas. (See the periodic table.) (a) Write a balanced chemical equation for the reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your ...
  23. Science

    A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 1.4. What is the final pressure of the gas relative to its initial pressure?
  24. Chem1020

    Sulfuric acid can dissolve aluminum metal according to the following reaction. 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 23.7 g . Sulfuric acid can dissolve aluminum metal according to the following reaction. 2Al(s...
  25. science

    The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the system ...
  26. science

    The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the system ...
  27. Chemistry

    I am looking at the delta H chart to calculate delta H of reactions. When doing one reaction, I came across a species that was not included in the chart: SiO4. What do I do? There is no SiO4. SiO2 perhaps, OR, you have been asked to calculate a theoretical molecule. Oh, you ...
  28. Chemistry

    What is a balanced equation for the reaction of aluminium selenide with water? Assume that aluminum hydroxide and hydrogen selenide are being formed. Then work out the balance.
  29. chemistry

    MF015 59 What is the acid dissociation constant for HA if pH = 2.74? [HA] = 0.020M? MF12063: What is the minimum energy barrier that musts be overcome for a chemical reaction to occur? is it the activation energy? yes
  30. Chemistry

    What gas is produced by the reaction of magnesium and HCl as evidenced by the "poof" test? acids react with active metals to yield hydrogen gas and a salt.
  31. science

    Completing Equations of chemical changes: EXample: Al+02- Al2O3 How do Iidentify which type of reaction is taking lace and then balance by using coefficients and not subscripts to balance
  32. Contemporary Business Communication

    What kind of unwanted reaction will I encounter when trying to convince a business committee to accept my proposal for a professional photography studio in their building?
  33. CHEMISTRY

    if insulin has 6 cysteines, how many millimoles of IAA would be consumed in a blocking reaction containing 10 mmol of reduced insulin? mass of cysteine - 121 g/mol.
  34. Chemistry

    Antacid neutralizes stomach acid by the following reaction: Mg(OH)2 + 2HCl -----> MgCl2 + 2H2O Calculate the amount of Mg(OH)2 (in grams) needed to neutralize 2.5 grams of HCl.
  35. chemistry

    I found a pattern and I was wondering if it applies to all reactions. The more times there is evidence of a redox reaction occuring for an element, the higher this element will be on the list?
  36. chemistry

    Hydrogen gas is produced when zinc reacts with hydrochloric acid. if the actual yeild of this reaction is 85%, how many grams of zinc are needed to produce 112L of H2 at STP?
  37. Chemistry

    Why does the reaction of 2-bromo-2-methylbutane and ethanolic solution of silver nitrate interfered by the presence of water in the sodium iodide in acetone reagent? (Substitution chemistry) Thanks for any help!!
  38. Chemistry

    How do you calculate the volume of titrant needed to reach the endpoint of a reaction when you are given the mls and molarity of a strong base and only the molarity of a weak acid?
  39. Social Studies

    What is a possible solution of ending the 1850s crisis? A solution that will address the failures of Congressional/Executive leadership, legislation and subsequent public reaction.
  40. organic chemistry

    Some biphenyl (C6H5-C6H5) is produced as a by-product in the synthesis of benzoic acid. Where does it come from? This question has to deal with the Grignard reaction. Can anyone help me with this please?
  41. chemistry

    How do I figure this out? In the reaction CS2 + 3O2 → CO2 + 2SO2, when 160 g of CS2 and 195 g of O2 are reacted, the theoretical yield of SO2 is 260 g.
  42. CHEMISTRY

    In some solid calcium carbonate samples, calcium bicarbonate, Ca(HCO3)2, is also present. Write a balanced euation for its reaction with hydrochloric acid.
  43. chem

    when water is added to solid calcium carbide, CaC2, acetylene gas, C2H2, and calcium hydroxide, Ca(OH)2 are produced. how do i write a balanced equation for the reaction.
  44. chemistry

    Write and balance the chemical reaction when gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (CH4) & liquid water
  45. chemistry

    when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how do i write a balanced equation for the reaction.
  46. Chemistry

    NH3(g) + 202(g) = HNO3(aq) +H2O (l) Is this reaction a combination, decomposition, single replacement, double replacment or other? Also is it redox or non redox?
  47. Chemistry

    Balance these reactions using the half-reaction method Sn2+ + IO3- -> Sn4= + I- (acidic solution) CrO2 + ClO- -> CrO42- + Cl- (basic solution)
  48. Chemistry

    What is the percentage yield for a reaction if you predict the formation of 21 grams of C6H12 and actually recomvered only 3.8 grams? is the answer 18% 3.8g/21g x 100% pls verify.
  49. chemistry

    Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) ÄH = -891 kJ Calculate the enthalpy change for each of the following cases. (a) 5.00 g methane is burned in excess oxygen.
  50. Chemistry

    Calculate the cell emf (in volts) for the following reaction at 25°C: Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M) [Enter only the number of your answer.] Answer
  51. chemistry urgent

    if 100 g of iron were reacted with 100 g of oxygen according to the reaction below, the maximum yield in grams of Fe2O3 would be: Dr. Bob. Please help.
  52. physical science with earth science

    Write a balanced chemical equation for the reaction for propane C3H8 burning in oxygen to for carbon dioxide and water vapor
  53. Chemistry

    CaO(s) + 3C(s) > CaC2(s) + CO(g) deltaHrxn = +464.8 kJ/mol-rxn Is the reaction endothermic or exothermic? What is the enthalpy change if 10.0 g of CaO is allowed to react with an excess of carbon?
  54. Chem

    Given the reaction: C8H16 + 12O2 --> 8CO2 + 8H2O How many moles of H2O are produced when 11.2 liters of C8H16 gas, measured at STP, reacts completely?
  55. Chemistry

    What mass of 3.0 wt% H2O2 solution is required to provide a 25% excess of reagent for the following reaction with 12 dietary iron tablets that contain ~15 mg of iron per tablet?
  56. chemistry

    chlorine is a non-metal, predict what will happen if you lower some burning sodium into a gas jar of chlorine. will there be a reaction? what product will be formed?
  57. Chemistry

    Consider the following reaction: PCl3 + 3H2O -----> P(OH) + 3HCl if 4.00L of PCl3 react with an excess of H2O at STP, how many grams of HCl would be formed?
  58. chemistry

    oxygen will react with the metal copper it will also react with the nonmetallic compound butane (c4h10) which ofthese reactions is combustion reaction?explain your answer.
  59. Chemistry

    Use the data in Table 15.3 (in the book Chemistry after Raymond Chang) to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH-(aq)= HCOO-(aq) + H2O(l)
  60. AP CHEM (URGENT)!!!!!

    How can ionization potential and electron affinity be used to predict whether or not a simple synthesis reaction will occur between a metal and a non-metal.
  61. chemistry

    The combustion of propane is given by the following reaction: C3H8 (g) + 5 O2 (g) ---> 3 CO2 (g) + 4 H2O (g) If 5.00 L of propane are burned in in the presence of excess O2, how many liters of carbon dioxide will be formed?
  62. health

    it is important to report changes in a client behaviour because A)change is of intrest to all B)the family of the person will ask about it. C)it may be a treatable medical reaction D) all of the above.
  63. health

    it is important to report changes in a client behaviour because A)change is of intrest to all B)the family of the person will ask about it. C)it may be a treatable medical reaction D) all of the above.
  64. chemistry

    How do I balance the following equation by the half-reaction method (it takes place in basic solution)? Fe(OH)2(s) + O2(g) = Fe(OH)3(s) the answer is 4Fe(OH)2(s) + 2H20(l) + O2(g) = 4Fe(OH)3(s) but how do I work it out?
  65. chemistry

    In the following reaction, how many grams of ferrous sulfide (FeS) will produce 0.56 grams of iron (III) oxide (Fe2O3)? 4FeS + 7O2 d 2Fe2O3 + 4SO2
  66. chemistry

    Write a balanced chemical equation for the reaction that occurs when barium carbonate decomposes into barium oxide and carbon dioxide gas when heated.
  67. CHM

    Consider the following reaction: HCN <--> H+ + CN- delta H = 315kJ If 1.00 mole of CN- in the form of NaCN was added to equilibrium mixture, describe the effect on [H+], [HCN], [CN-], pH, and heat.
  68. Chemistry

    You mix 200.0 mL of 0.350 M HCl with a 300.0 mL solution of 0.100 M Ba(OH)2. Calculate the concentration of each ion remaining in the solution after the reaction has reached completion.
  69. AP Chemistry

    Calculate the standard cell emf for galvanic cells with the cell reaction 2H2(g) + O2(g)→2H2O(ℓ)in acidic solution. Answer in units of V
  70. Chemistry

    For the following chemical reaction, what mass of silver nitrate in grams will be needed to produce 3.91 mol of calcium nitrate? CaI2+2AgNO3=2AgI+Ca(NO3)2
  71. Ap Chemistry

    Adding or taking away small amounts of water in a reaction that takes places in an aqueous solution ____________________ affect the overall concentration of water.
  72. Chem

    S2 + C ----> CS2 How many grams of CS2 can be prepared by heating 11.0 moles of S2 with excess carbon in 5.20 L reaction vessel held at 900 kelvin until equilibrium is attained? Kc= 9.40
  73. Chemistry 2

    For the fist order reaction A <-> B, calculate the t1/2(half life) and k(rate constant) and also fill in the blanks. A-Concetration t-time 20 0 10 ? 5 40 sec 3 ? ? 500 sec t1/2=? k=?
  74. Chemistry 2

    For the fist order reaction A <-> B, calculate the t1/2(half life) and k(rate constant) and also fill in the blanks. A-Concetration t-time 20 0 10 ? 5 40 sec 3 ? ? 500 sec t1/2=? k=?
  75. chemistry

    The decomposition reaction, x-->products, is second-order with rate constant k=0.0183 L/(s)(mol). How long will it take for the decomposition to be 95% complete, if the intitial concentration of X is 1.25mol/L? Thanks
  76. College chemistry

    What is the volume in milliliters of 0.1069 M Cr2O72- required to react with 252.4 mL of 0.08013 M Cl- according to the reaction below? 6 Cl-(aq) + Cr2O72-(aq) + 14 H+(aq) ® 3 Cl2(g) + 2 Cr3+(aq) + 7 H2O(l)
  77. Science PLEASE HELP

    How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
  78. chemistry

    Consider the reaction of 14.20ml of 0.141 M H3PO4 and 0.0521 M Ba(OH)2. 2H3PO4 + 3Ba(OH)2 ->Ba3(PO4)2 + 6HOH What volume of Ba(OH)2 is required to completely react with the H3PO4?
  79. chemistry

    Consider the reaction of 14.20ml of 0.141 M H3PO4 and 0.0521 M Ba(OH)2. 2H3PO4 + 3Ba(OH)2 ->Ba3(PO4)2 + 6HOH What volume of Ba(OH)2 is required to completely react with the H3PO4?
  80. Chemistry

    A 1.500 mol sample of PCL5 dissociates at 160C and 1.00 atm to give 0.203 mol of PCL3 at equilibrium. What is the composition of the final reaction mixture?
  81. science

    if 1g of carbon dioxide is bubbled into 100g of a calcium hydroxide solution in a flask. what is the total mass of substance in the flask after the reaction is complete?
  82. Heat

    Consider the following equation: CO + 2 H2 → CH3OH ΔH rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2. How would u set that up?
  83. Chem

    Using the same unbalanced chemical reaction, what is the theorectical yeild of CO2 if 16.0g of methane reacts with excess oxygen: CH4(g)+ O2 (g)→ CO2 (g)+ H2O(g)
  84. Chemestry

    Iron metal reacts with oxygen gas to form rust, iron (III) oxide. Which of the following correctly shows the balanced equation for this reaction?
  85. Chemistry

    The reaction N2O4(g) -->2NO2(g) has Kc = 0.133 at 25 °C. What is the NO2 concentration in a 5.00 liter flask if it contains 0.250 mol of N2O4 at equilibrium I know I set something equal to Kc?
  86. Chemistry

    Use the method of half reactions to balance the oxidation half reaction in acid solution as well as provide the oxidized and reduced reactants. Cr2O7 {2-} (aq) + F{-} (aq) = Cr {3+} (aq) + F2(aq) Charges are in { }
  87. Chemistry

    Use bond energies to determine the energy transferred in the reaction between hydrogen and chlorine to make hydrogen chloride. H2 (g) + Cl2 (g) → 2HCl (g)
  88. Chemistry

    When a 3.80 g sample of magnesium nitride (MW 101g/mol) is reacted with 3.30 g of water, 3.60 g of MgO is formed. What is the percent yield of this reaction? Mg3N2 + 3 H2O --> 2 NH3 + 3 MgO
  89. chemistry

    How much energy is evolved during the formation of 98.7 g of Fe, according to the reaction below? Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s) ΔH°rxn = -852 kJ A. 482 kJ B. 753 kJ C. 1.51 × 10ee3 kJ D. 4.20 × 10ee3 kJ
  90. Chemistry

    Given the same reaction as before: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 Great! 3.21 moles of O2 were produced. Now, How many molecules of O2 does this number of moles represent?
  91. Chem

    Complete and balance the molecular equation, including phases, for the reaction of aqueous sodium sulfate, Na2SO4, and aqueous barium nitrate, Ba(NO3)2. I don't know how to do this please help
  92. Chemistry

    Can diborane (B2H6) react with an alkene in a Hydroboration reaction or its BH3 the one that reacts so the splitting of diborane to borane has to be considered because I heard theyre the same?
  93. Chemistry

    Calcium carbonate is insoluble in water. Name two substances that when mixed in solution, will form a precipitate of calcium carbonate. Explain why is it the two substances that you have chosen.  why does magnesium chloride cannot be prepared in the lab by the reaction of ...
  94. science

    The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the system ...
  95. Chemistry

    An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was colleced over water at 25˚C ...
  96. Chemistry

    8. Imagine you have two containers of gas, one labeled gas A and one labeled gas B. Gas A has an average speed of 700 m/s and gas B has an average speed of 1100 m/s. Both containers are being held at the same temperature. How could you match the average speeds of gas A and gas...
  97. Physics

    A certain type of ideal gas at pressure p0 is contained in a plugged flask of volume V initially at temperature T1. The environmental pressure remains constant p0. (A) As the flask is heated up to temperature T2, the plug pops out. What is the pressure p2 of the ideal gas ...
  98. Chemistry

    -CORRECTION- N2 + O2 --> 2 NO change in heat (delta H)= 43.2 kcal based on the reaction, which statement is true? a) 43.2 kcal are consumed when 1.00g of O2 reacts b) 43.2 kcal are consumed when 1.00g of N2 reacts c) 43.2 kcal are consumed when 1.00g of NO is produced d) 43...
  99. General Physics

    A block sliding on a horizontal surface has an initial speed of 0.5 m/s. The block travels a distance of 1 m as it slows to a stop. What distance would the block have traveled if its initial speed had been 1 m/s? 1. 2 m 2. 1 m 3. more information is needed to answer the ...
  100. SCIENCE

    According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactnats?
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