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 68

  1. CHEMISTRY

    Balance the oxidation reduction equation in half reaction PbO2 + KCl => KClO + KPb(OH)3 thank you a lot
  2. Chemistry

    Write an equation for the reaction that takes place when each base is added to water. A) LiOH B) (CH3)2NH.
  3. Chemistry

    Write the ionic equation for the reaction of lead 2 nitrate reacting with the acidic solution to form a precipitate
  4. CHM

    suggest an alternative indicator for the standardization reaction. Explain the rationale behind your choice. Used 10 g of KHP
  5. chemistry

    When 34.1 g of lead reacts with 6.81 L of oxygen gas, measured at 1.00 atm and 25.0°C, 36.1 kJ of heat is released at constant pressure. What is DH° for this reaction?
  6. Physical Education help

    The body's reaction to information is to send these to the brain. A. Neurons B. Impulses C. Dendrites D. Synapse Is the answer B? Thank you
  7. chemistry

    How do you write a balanced equation for the preparation of phenylmagnesium bromide and it's reaction with benzophenone followed by neutralization in acid?
  8. Science Help!

    Which reaction is exothermic? A. Cellular respiration B. Photosythesis C. Baking soda+ vinegar D. Melting ice Is the answer A?
  9. Chemistry

    If 45.5 g of calcium carbonate is reacted with phosphoric acid, how many grams of carbon dioxide will be produced if the reaction yield is 85.0 %?
  10. Chemistry

    Identify the Bronsted-Lowry acid in the following reaction. H2O (l) + HCO31- (aq) → H3O+ (aq) + CO32- (aq)
  11. Organic chemistry

    What kind of reaction is occurring between potassium permanganate and cyclohexene? (I.e. Combination, double displacement, etc.
  12. chemistry

    What physical property of water and HCl allows us to separate them from the zinc chlorine compound produced in the reaction?
  13. Science

    Given the following balanced equation, determine the rate of reaction with respect to [O2]. 2 SO2(g) + O2(g) → 2 SO3(g)
  14. Chemistry

    After 62.0 min, 11.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics?
  15. CHEMISTRY

    What weight of NH4Cl(s) is produced by the reaction of 17.0 g of NH3(g)with 60.0 g of HCl(g). A.34.0g B53.5g, C60.0g, D94.0g add explanation thanks!
  16. Chemistry 1002

    Calculate the standard entropy change for the following reaction at 25 °C. 2 Al (s) + 3 ZnO (s) --> Al2O3 (s) + Zn (s) answer is in J/K mol
  17. AP Chem

    Lead metal is added to a solution of hydrochloric acid. What would be the theoretical cell potential, E°, for the reaction?
  18. Chemistry

    Balance the reaction using half reactions under BASIC conditions: Al + CrO4^-2 ---> Al(OH)3 + Cr(OH)3 I'm not sure how to do this question.
  19. chemistry

    Please tell me any website....where I can find details of the experiment Reaction of 4-aminotoluene and o-vanillin(for preparation of azomethine)
  20. AP Chemistry

    For each of the following pairs of half-cells, determine the overall electrochemical reaction that proceeds spontaneously. Na+ | Na, Ni2+ | Ni
  21. Chemistry

    Explain how conc. H2so4 catalysis the speed of the reaction between salicylic acid and acetic anhydride.
  22. Chemistry

    Calculate the volume (in mL) of 0.627 M HNO3 needed to react completely with 8.12 g of BaCO3 in a gas-forming reaction
  23. chemistry

    how many grams of Zn metal would you use to prepare 6.8g of zinc chloride according the reaction: Zn(s)+2HCl(aq)-> ZnCl2(aq)+H2(g)
  24. chemistry

    how many grams of Zn metal would you use to prepare 6.8g of zinc chloride according the reaction: Zn(s)+2HCl(aq)-> ZnCl2(aq)+H2(g)
  25. Chem

    If a reaction has a change of H of -120.0 kcals/mole and is spontaneous for all temperatures less than 200.0K, what is its ΔS?
  26. chemistry

    The basicity of tetraoxosulphate(6) is 2. explain this statement with an equation showing the reaction between the acid and potassium hydroxide
  27. science

    you plan to measure the thermal energy released durning a chemical reaction what tool would you use
  28. Science

    Write the word equation to show the chemical reaction taking place during acid rain?
  29. chemistry

    How many grams of Mg(OH)2 would be produced from 4 mol KOH? if the balanced reaction is MgCl2 +2KOH arrow Mg(OH)2 + 2KCl?
  30. Chemistry

    All the following are necessary parts of a neutralization reaction except A) an acid B) an indicator C) water D) a salt.
  31. Chemistry

    Write a balanced equation for the complete oxidation reaction that occurs when ethanol (C2H5OH) burns in air.
  32. science

    The rate constant of a certain reaction is given by log K= 212/T Calculate the activation energy at 400K.
  33. Chemistry

    a 0.1 gm sample requires 20.5 ml B for reaction. the B was standardized by titrating 25 ml of a 0.1M CaCl2 solution, requiring 30 ml B. calculate the percent Al2O3
  34. Chemistry

    Complete and balance the following equation. If no reaction occurs, write noreaction . NaOH(aq)+FeBr3(aq)→
  35. Chemistry

    Calculate enthalpy of the reaction ethene+hydrogen gives ethane are -1410KJ,-286kJ and -1560KJ respectively at 25°c
  36. physics

    a uniform rod is 1m caring a weight of 100N calculate its tension of the string holding it an the reaction at the hinge
  37. Chemistry please help!

    Calculate (triangle)H for the following gas-phase reaction: 2 H-C (3dashes) C-H + 5 O=O --> 4 O=C=O = 2 H-O-H -Using bond energies
  38. chemiste-ry

    Consider the following equation: CO + 2 H 2 → CH 3 OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H 2 .
  39. Chem 1

    Use oxidation states to identify the element that is being oxidized in the following redox reaction: Cu(s)+2 H 2 S O 4 (aq) → CuS O 4 (aq)+S O 2 (g)+2 H 2 O(l)
  40. Chemistry

    What is the percent yield of a reaction that converts 5,0 kg of toluene to 6,02 kg of benzoic acid? 2C6H5CH3 + 3O2 --> 2C6H5CO2H + 2H2O
  41. Science

    I'm doing an assignment and one of the questions is explain the reaction using the Big Idea of Energy. I don't know how to answer it please help!
  42. chemistry

    What is the mass of the organic substance formed by heating of 21.0g of butanoate of ammonium, admitting that the reaction presents a yield of 50%?
  43. chemsitry

    Calculate the work in kilojoules done during a reaction in which the volume expands from 10.0 L to 95.9 L against an external pressure of 2.5 atm.
  44. Chemistry

    Write an equilibrium reaction equation for each of the following buffer mixtures: a)NH3(aq) and NH4Cl(aq) b)HC7H5O2(aq) and NaC7H5O2(aq)
  45. Chemistry

    H2SO4(aq) + H2O(l) ⟶ H3O+(aq) + HSO4–(aq) (Stage I) Identify the Brønsted-Lowry acid and base in the reaction.
  46. Chemistry

    What's the net ionic equation for the reaction: PH3(g) + O2(g) → P2O5(s) + H2O(g)? Please show your work so I can follow Thanks!!
  47. Science

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

    I am having trouble in calculating equilibrium concentrations. Where I get stuck will be at the end where I have to square root both sides and get the value of x to plug in the equation to get the individual concentration of every substance.
  49. ph

    calculate the heat of fusion of ice from the following data at 0°c add to water : Mass of calorimetet 60 g Mass of calorimeter and water 460 Mass of calorimeter plus water and ice 618 g Initial temperature of water 38 °c Final temperature of mixture 5 °c Specific heat of ...
  50. chem expirement!

    You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose enthalpy of reaction is ...
  51. 12th grade English

    Can you check my essay, it is not done, but I want to see if I'm on the right track? My essay is on Hamlet and the thesis statement: "Domino effect of death" Hamlet: A Chain Reaction of Death In Hamlet, death is seen throughout the play, and is one of the primary themes. It ...
  52. chm

    You are heating crushed ice and a small amount of water and monitoring the temperature of the icy slurry until it reaches the point were the ice is nearly melted. How does the temperature change during this process? The temperature drops as the ice absorbs the heat and ...
  53. chemistry

    Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent variable in this ...
  54. AP Chem

    For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a constant ...
  55. chemistry

    Consider the following reagents: zinc, copper, mercury (density: 13.6 g/mL), silver nitrate solution, nitric acid solution. a. Given a 500-mL Erlenmeyer flask and a balloon can you combine two or more of the foregoing reagents to initiate a chemical reaction that will inflate ...
  56. physics

    A stone is thrown downward into a well with an initial speed of 5.00 m/s. The sound of splash is heard 1.50 s later. Find the depth of the well if the air temperature is 15.0 ˚C?
  57. chemistry

    Use the activity series of metals to write a balanced chemical equation for each single-replacement reaction. Zn(s) + AgNO3 (aq) --> NOTE: The three above is a subscript...it should be a small 3. Please explain how to figure out this problem, and provide a thorough ...
  58. chemistry

    Equal volumes of 0.00150M FeCl3 and 0.00200M NaSCN were mixed together and reacted according to the equation: Fe3+ + SCN- <--> FeSCN2+ The equilibrium concentration of FeSCN 2+ was 1.40 x 10^-4 M Calclulate the equilibrium constant for the reaction. I got 55.3...is that ...
  59. chemistry

    In an experiment a student allowed benzene C6H6+ TO REACT WITH EXCESS BROMINE BR2+ In an attempt to prepare bromobenzene C6H5Br. This reaction also produced as a by-product, dibromobenzene, C6H4Br2+ On the basis of the equation. What is the maximum amount of C6H5Br that the ...
  60. Chemistry-DrBob222

    Arrows disappeared from below added them back to the equations. ??(a) I don't understand ln(No/N)=akt Is (a) -3.77 The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will [IBr] become after 2.50 ...
  61. chemistry

    Calculate the volume of natural gas (methane) required to bring 2.6 L of water to a boil. Assume the initial temperature of the water is 21 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 ...
  62. Chemistry(Please check answers)

    1) The standard molar entropy value of N2 (g) is 191.5 J/K-mol, of O2 (g) is 205.0 J/K-mol and of NO2 (g) is 240.0 J/K-mol. From these values we can calculate the Delta So for the reaction N2 (g) + 2 O2 (g)-> 2 NO2 (g) to be? I did products - reactants (240 X 2) - [191.5...
  63. College Chemistry

    Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the -2 mM, 7.16 times 10 to the -3 mM, 0.965 mM, and 5.00 times 10 to the -2 mM, respectively. What are the corresponding concentration is milligrams per liter? A. ...
  64. Chemistry

    For a reversible reaction where A + B (both arrows) C + D, the equilibrium constant is represented by kc = 5.3 = (c)(d)/(A)[B]. Initially A and B are present at 2.00 M each. What is the final concentration of A once equilibrium is reached. I made an ICE table and came up with ...
  65. Chemistry

    A chemist carries out a reaction between 10.0g of sodium and 20.0g chlorine. Which reactant element is present in excess? What quantity of sodium chloride is produced? What quantity of the elment in short supply would have been required to react with all of the element present...
  66. chemistry

    Write a balanced chemical equation for the neutralization reaction between aqueous hydrochloric acid and aqueous calcium hydroxide. Be sure the formulas are written correctly before balancing, and include phases. HCl+H2CaO2 im not sure that's written correctly but that is what...
  67. Algebra

    Austin checks the temperature at 10:00 p.m. He notices if the temperature falls by 5 more degrees, it will break the record-low temperature for that date, which is 26 degrees. If t= the temperature in degrees at 10:00 p.m., which mathematical sentence expresses the information...
  68. chemistry

    This is from a "effect of pH on the solubility of Ca(OH)2" lab: If excess Ca(NO3)2 were present, what effect would it have on the solubility of Ca9OH)2? also, in a "effect of comlex ion formaiton on the solubility of NiCO3" lab": If HCl(aq) were added to the NiCo3 precipitate...
  69. Chemistry

    Compound 1 Compound 2 O || CH2=CH-CH-OH + CH3-CH-CH2-C | | | CH3 CH3 OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by drawing the abbreviated structural formula(e) of the ...
  70. AP Chemistry

    Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
  71. Physics

    1). A hot iron horseshoe (mass=.40kg), just forged, is dropped into 1.35L of water in a .30kg iron pot initially at 20.0 degrees Celsius. If the final equilibrium temperature is 25.0 degrees Celsius, estimate the initial temperature of the hot horseshoe. 2). A cube of ice is ...
  72. chemistry calculations

    At 25 deg C, Kc is 5.84x10-3 for the dissociation of dinitrogen tetraoxide to nitrogen dioxide. N2O4(g) ==== 2NO2(g) a) Calculate the equilibrium concentration of both gases when 4.00 grams of N2O4 is placed at 2.00-liter flask at 25 deg C. b) What will be the new equilibrium ...
  73. Physics

    i'm really lost here. please show me how to solve this A 0.10 kg piece of copper at an initial temperature of 94 degrees C is dropped into 0.20 kg of water contained in a 0.28 kg aluminum calorimeter. The water and calorimeter are initially at 15 degrees C. What is the final ...
  74. Physics

    A class of 11 students taking an exam has a power output per student of 122 W. Assume that the initial temperature of the room is 18.8oC and that its dimensions are 6.40 m by 14.5 m by 3.50 m. What is the temperature (in oC, do not enter units) of the room at the end of 54.0 ...
  75. Math

    Human body temperatures have a mean of 98.20degrees°F and a standard deviation of 0.62degrees°F. ​Sally's temperature can be described by zequals=minus−1.5. What is her​ temperature? Round your answer to the nearest hundredth.
  76. Chemistry

    Ok this is my last hope, I totally don't get this question. Suppose you have one beaker of H2O at a certain mass and temperature and another beaker of H2O at a different mass and temperature. You then pour these two beakers into one separate beaker. How do I figure out the ...
  77. Physics

    I have learnt that when we push an object on a horizontal plane with a certain angle, we are increasing its normal reaction and therefore friction increases. Whereas if we pull it, friction decreases. Is that true? Yes, there is more friction if you push down, at an angle, ...
  78. Calculus with Diffrential Equations: Pleease help?

    Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = -1/15T+5 15T + 5. a) Supposes that T(0) = 105. What does the...
  79. physics

    A 0.10 kg piece of copper at an initial temperature of 95degC is dropped into 0.20 kg of water contained in a 0.28 kg aluminum calorimeter. The water and calorimeter are initially at 15degC. What is the final temperature of the system when it reaches equilibrium? (Cp of Copper...
  80. chemistry

    home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ... Question A chemical engineer studying the properties of fuels placed 1.760 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2 gas The bomb was ...
  81. Aplied maths

    1. A steel plate initially at 21.2°C is placed in a furnace at 785°C for 58.0 minutes. While in the furnace the temperature of the plate increases at a rate of 4.18% per minute. After 58.0 minutes, the plate is removed from the furnace and placed on a concrete slab to cool. ...
  82. Math 3rd

    Tim tracked the change in outside temperature one afternoon. He recorded a temp of 85.4 f at noon. The Temperature then rose 3.85 f over the next 4 hours. At 5:00 Tim recorded the temperature of 89.25 f how did the temperature change betwn 4:00pm and 5:00pm? My cousin got the ...
  83. Chem

    Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the -2 mM, 7.16 times 10 to the -3 mM, 0.965 mM, and 5.00 times 10 to the -2 mM, respectively. What are the corresponding concentration is milligrams per liter? A. ...
  84. A.P Chemistry

    A rigid 5.00 L cylinder contains 24.5g of N2(g) and 28.0g of O2(g). (a). Calculate the total pressure, in atm, of the gas mixture in the cylinder at 298 K (b) The temperature of the gas mixture in the cylinder is decreased to 280 K. Calculate each of the following. 1) The mole...
  85. physics

    A car is traveling at a constant initial velocity of 100km/h on a level portion of road. It encounters a 6 percent incline (tan(theta)= 6/100) at point A and the car decelerates at a constant rate of gsin(theta). Find the speed of the car (a) 10 seconds after passing point A ...
  86. Algebra NEED HELP ASAP!!!!!!

    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)
  87. Chemistry

    I am soo lost on this one, I don't even know where to begin! I have read the chapter and it's just not clicking! If you start your reaction with 0.083 g of salicylic acid, what theoretical yield of acetylsalicylic acid would you predict? If your experimental yield of ...
  88. Differential equations in Calculus...plsssss help?

    Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = -1/15T+5 15T + 5. a) Supposes that T(0) = 105. What does the...
  89. Science. NEED HELP PLEASE

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

    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 ...
  91. chemistry

    Chlorine dioxide, ClO2, has been used as a disinfectant in air conditioning systems. It reacts with water according to the following equation. 6ClO2 + 3H2O --> 5HClO3 + HCl If 142.0 g of ClO2 is mixed with 33.0 g of H2O, how many grams of the reactant will remain if the ...
  92. Economics

    I have to fill in the following for a fascist economy. Ownership of resources = private Philosophers= Karl Marx (are there more?) Role of government= to controls production and allocation of resources Reaction to social and technological Change= don't know Role of nature= don'...
  93. Chem II - Equilibrium

    A 2.00 mol sample of nitrogen dioxide was placed in an 80.0L vessel. At 200 degrees C, the nigrogen dioxide was 6.0% decomposed according to the equation: 2NO2 in equilibrium 2NO + O2 Calculate the value of Kc for this reaction at 200 degrees C. I have worked through this ...
  94. chemistry

    Methane reacts with an excess of chlorine gas. [it's an equation] I have the reactants: CH4(g) + Cl2(g) --> ? I was thinking single replacement, making CCl4 for sure. I'm just not sure about that hydrogen, unless it's just H2, and when balanced the full reaction is this: ...
  95. Chemistry

    Write the reaction for the synthesis of water vapor from hydrogen gas and oxygen gas and balance it. If you used 0.022 mol hydrogen, how many mol of oxygen would you need in order for it to completely react and have no limiting reactant? Can you please explain in detail how to...
  96. Chemistry

    1)During an endothermic reaction, total energy A. decreases. B. increases. C. stays the same. D. cannot be determined. 2)The enthalpy of formation of an element is A. negative. B. positive. C. zero. D. negative or positive, depending on which element. i think number 1 is A for...
  97. chemistry

    ClO3^-(aq)+3SO3^2- ¡÷ Cl^-(aq)+3SO4^2- 1) If the SO3^2- ion is disaapearing at rate of 0.458 mol/L*s, how fast is the Cl^- ion appearing? 2) if the after 10 minutes of reaction time, 1.09x10^-4 mole of Cl^- ion has been produced, how many moles of SO3^2- ion have been used ...
  98. Chemistry-w/addition

    At elevated temperatures, SbCl5 gas decomposes into SbCl3 gas and Cl2 gas as shown by the following equation: SbCl5(g)<=> SbCl3(g) + Cl2(g) (a) An 59.8 gram sample of SbCl5 (molecular weight 299.0) is placed in an evacuated 15.0 liter container at 182°C. 1. What is the ...
  99. phy

    (Q1)the temperature at which the tungsten filament of a 12v and 36w lamp operates is 1730c.If the temperature coefficient of resistance of tungsten is 0.006/k, find the resistance of the lamp at room temperature of 20c (a)10.00(b)0.45ohms(c)0.39ohms(d)4.00ohms (Q2)At what ...
  100. REACTION KINECTICS

    The autocatalytic reaction of A to form Q is one that accelerates with conversion. An example of this is shown below: A+Q~Q+Q However, the rate decreases at high conversion due to the depletion of reactant A. The liquid feed to the reactor contains 1 mol L-] of A and 0.1 mol L...
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