1. Chemistry

    What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules
  2. Chem please help

    What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules
  3. CHEMISTRY

    Silver reacts with nitric acid to form nitrogen monoxide, silver nitrate and water. Calculate the volume of nitrogen monoxide gas (@STP) that can be produced from the reaction of 5.00g of silver?
  4. chemistry

    A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated? Will a
  5. chemistry

    a first order reaction has a rate constant of 7.5 x 10^-3/s. The time required for th reaction to be 60% complete is
  6. chemistry

    Balance the following redox reaction using the half reaction method: NaIO3+KI==> I2+H20+Na(+1)+K(+1)
  7. Chemistry

    Could you explain in detail why a saponification reaction is considered to be the reverse of an esterification reaction.
  8. chemistry

    WHAT WOULD HAPPEN TO THE REACTION THAT PRODUCES AMMONIA IF WATER IS PRESENT IN THE REACTION MIXTURE?
  9. Chemistry

    For the following redox reaction, give the complete reduction half reaction. Na(s) + Al+3(aq) Na+1(aq) + Al(s) Please help asap!!
  10. Chem II

    A first-order reaction is 35.5% complete in 4.90 minutes. The rate constant of the reaction is _____
  11. Chemistry

    Explain, in terms of collision theory, how and why a reaction’s rate changes as the reaction progresses.
  12. Chem II

    The reaction A -->B---> C is called a _______ reaction? Consecutive parallel competing stepwise
  13. chemistry

    The reaction of 9.58 g of Carbon with excess O2 yields 8.90 g of CO2, what is the percent yield of this reaction?
  14. chemistry

    Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Why would the delta s of the rxn be less than zero? thanks.
  15. biochemistry

    I am studying for a midterm. Do you know this answer? what reaction does LDH actually catalize and why is that reaction important?
  16. umuc

    For the reaction HCONH2(g) NH3(g) + CO(g), Kc = 4.84 at 400 K. If ΔH° for this reaction is 29 kJ/mol, find Kc at 500 K.
  17. Chemistry

    What mass of N2O5 will result from the reaction of 6.0 mol of NO2 if there is a 61.2% yield in the reaction?
  18. CHEMISTRY

    In electrolysis , which reaction does occur on the cathode , half oxidation reaction or reduction ?
  19. college

    For the reaction P4(s) + O2(g) = P4 O10(s) Identify the limiting reaction mixture conataining 1.00 mol each of P4 and O2
  20. Chemistry

    Assume the reaction of 55.25 g of Ge in the following reaction to determine the other quantities. 3Ge + 2N2 -> 1Ge3N4
  21. Chemistry

    Balance the redox reaction below using the half-reaction method. Bi3+(aq) + Co(s)Bi(s) + Co2+(aq)
  22. gr 12 chemistry

    write an equation for a reaction involving an aldehyde to illustrate a hydrogenation reaction.
  23. biochemistry

    The ΔG¡' of the reaction is -5.31 kJ ámolÐ1. Calculate the equilibrium constant for the reaction. (Assume a temperature of 25¡ C.)
  24. Chemistry

    Given the reaction: Ni (s) + 4 CO (g)  Ni(CO)4 (g) E = –154 kJ, how many kilograms of CO are required for this reaction to release 756 kJ of energy?
  25. science

    2KClO3 - 2KCl + 3O2 is formed ! now which kind of reaction is this ? and how can i say it is that particular reaction took place here?
  26. chemistry

    Consider the reaction Select a possible mechanism for the reaction. Step1:2X2Y+Z2→2X2YZ (slow)
  27. Chemistry

    Cyclobutane consisting of molecules in which four carbon atoms form a ring decomposes when heated to give ethylene. The reaction is first order. In an experiment, the initial concentration of cuclobutane was 0.00150M. After heating at 450 degrees C for
  28. Chemistry

    Cyclobutane consisting of molecules in which four carbon atoms form a ring decomposes when heated to give ethylene. The reaction is first order. In an experiment, the initial concentration of cuclobutane was 0.00150M. After heating at 450 degrees C for
  29. Concentration and Reaction

    The rate of the following reaction: Radioactive decay of 90Sr, is characterized by the rate constant k = 0.024 year-1. What is the half-life (in years) for this reaction at the same conditions when the initial concentrations are 0.0356 M? (Round your
  30. Algebra

    Can you please help me with the below question: The vertex of a parabola is located at (-12, -1). The parabola also passes through the point (-10, 5). Write the equation of this parabola in both vertex form and standard form. Vertex form: Standard form:
  31. Chemistry

    Assume that a reaction occurs in which unknown substances R and S react to form unknown substances T and U. From the information below, determine the mass of substance T that will be formed if 45.0 grams of substance R reacts with 23.0 grams of substance
  32. Chemistry

    The reaction N2(g)+3H2(g)2NH3(g) begins with 1.15 M N2 and 1.36 M H2. At equilibrium the concentration of NH3 is 0.78 M. Determine the extent of reaction.
  33. Dr.Bob222 Chem

    I believe that you are correct because you have more experience in G-chem then I have. But how does doubling the reaction rate double the k value? Isn't k just a constant for a particular reaction?
  34. chemistry

    A reaction rate increases by 60.3% when the temperature is increased from 21.5 to 35.6°C. Calculate the activation energy (in kJ/mol) for the reaction.
  35. Chemistry - Rates

    For a particular reaction, the rate constant is 2.32 ✕ 10−3 M/s at 185°C and 3.70 ✕ 10−3 M/s at 235°C. What is the activation energy for this reaction? _______ kJ/mol
  36. chemical

    how to obtain the kinetic data for this reaction 2NO3+2H2>2H2O+N2 HOW TO PERFORM THIS REACTION IN LAB.
  37. chemistry

    what gas is produced in the reaction between calcium carbide and water?write the balanced equation for the reaction.
  38. Chemistry

    How much heat (in kilojoules) is released on reaction of 4.10 g of Al? Reaction: 2Al(s) + 3Cl2(g)--->2AlCl3(s) Delta H= -1408.4 KJ
  39. chemistry

    Consider the following reaction: 2 Mg + O2 → 2 MgO △H rxn = -1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg.
  40. chemistry

    Which element is reduced in the unbalanced reaction below? I− + MnO4− + H+ = I2 + MnO2 + H2O I no reduction occurred in this reaction O H Mn
  41. chemistry

    CO2 + 3H2 equilibrium CH4 + H2O what is the forward and reverse reaction for it? what are the units of Kc for this reaction?
  42. Chemistry - Science (Dr. Bob222)

    Consider reaction below: 50H3O^+(aq) + 7Cr2O7^2-(aq) +3I_2(aq) --> 6IO_4^-(aq) + 14Cr^3+(aq) + 75H2O (l) How many electrons are transferred in this reaction?
  43. Chemistry

    Given the balanced equation representing a reaction: 2CO(g)+O2(g)-->2CO2(g) what is the mole ration of CO(g) to CO2(g)in this reaction? (1)1:1 (2)1:2 (3)2:1 (4)3:2
  44. CHEM

    How are the forward and reverse rate constants for a one-step reaction related to the equilibrium constant for the reaction? A)Kc = kf x kr B) Kc = kf - kr C) Kc = kf + kr D) Kc = kf/kr
  45. physics

    Refering to reaction 2 H2(g) + O2(g) -> 2 H2O(g) and proving that the law of conservation of mass is obeyed during a chemical reaction.
  46. Kinetics Problem II

    The data below were collected for the following reaction: 2NO2 (g) + F2 (g) ->2NO2F(g) A: Calculate the value of the rate constant, k. B: What is the overall order of the reaction?
  47. Chemistry

    For the balanced redox reaction 2 Al(s) + 3 Br2(g) → Al2Br6(s), determine the number of electrons transferred in the overall reaction.
  48. Chemistry

    A certain reaction has an activation energy of 37.30 kj/mol. At what Kelvin temperature will the reaction proceed 3.00 times then it did at 303 k?
  49. chemistry

    consider the reaction in which 410g of Ca(NO3)2 react with just the right amount of lithium metal in a single replacement reaction ?
  50. chemistry

    Consider the following reaction: 3C(s) + 4H2(g) -> C3H8(g); DH° = –104.7 kJ; DS° = –287.4 J/K at 298 K What is the equilibrium constant at 400.0 K for this reaction?
  51. physical science

    the influence of the magnitude of the surface area on the rate of reaction of a specific reaction using rennies tables
  52. chem

    what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2
  53. Chemistry

    At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?
  54. Chemistry

    Half reaction method of balancing redox reaction CHCl3 + MnO4- = Cl2 + CO2 + Mn+2
  55. chemistry

    does a fission reaction release one-fourth of the amount of energy released ina fusion reaction?
  56. chem

    what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2
  57. chemistry

    The reactant concentration in a second-order reaction was 0.790 after 200 and 8.80×10−2 after 740 . What is the rate constant for this reaction?
  58. Chemistry

    Al(s) + MnO2(s) → Al2O3(s) + Mn(s) When this reaction is balanced, how many electrons are transferred in each half-reaction? The answer I got is 3*2=6. Is this correct?
  59. Chemistry quistion help!

    I need help answer this question for a chemistry homework. What are the products in a reaction between an acid and a base? How can you tell that a reaction has occurred?
  60. Chemistry

    At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?
  61. Music, Form.

    AB form and verse/refrain form are the same, aren't they? Thank you for using the Jiskha Homework Help Forum. Since you are obviously studying music, you may appreciate the following website with a glossary of musical terminology. The AB form is at the
  62. 7th grade math standard form scientific notation

    In standard form: 5. 3.2 x 10^3 7. 4.1 x 10^8 9. Write the average weight of a blue whale, 2.6 x 10^5, in standard form. 15. 2.5 x 10^-3 17. 1.05 x 10^-2 19. Write the size of a grain of very fine sand, about 9.35 x 10^-3 cm, in standard form. Can somebody
  63. chemistry

    Sodium nitrate reacts with copper (II) hydroxide. I know how to write it down: NaNo3+CuOH2----> NO REACTION The problem is that I don't understand why it's no reaction I know it's double replacement and we have to look at activity series of metal to figure
  64. chem

    For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) PCl3(g) + Cl2(g) a) What is the sign of S° for the reaction? Explain. b) What change, if any, will
  65. chemistry

    If you had left your copper(II) nitrate/potassium hydroxide precipitate stand for a while, the precipitate would turn into a black powder. The copper doesn’t reduce in this reaction, but one mole of water is produced from the reaction of one mole of the
  66. SCIENCE

    I mix 300.0ml of the barium nitrate solution from 1c with 100ml of a 1.50M lithium phosphate solution. The reaction produces solid barium phosphate a. Write a balanced equation for the reaction. b. Which is my limiting reagent? c. How much barium phosphate
  67. Chemistry

    using kinetics explain: a.the increasing of concentration of reactants increases the rate of reaction. b.the addition of a catalyst increases the rate at which a reaction will take place. c.and increase in temperature increases reaction rate. d.a catalyst
  68. Chemistry

    When the oxide of generic metal M is heated at 25.0 °C, only a negligible amount of M is produced. O2M(s) ----> M(s) +O2(g) Delta G^o = 290.3 kJ/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous.
  69. Chemistry

    The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use
  70. Chemistry(Please help explain)

    The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use
  71. Chemistry(Can someone please answer!!)

    The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use
  72. Chemistry

    The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use
  73. Chemistry

    Write a balanced equation for the following reaction. Use whole number coefficients and subscripts as appropriate. Carbon tetrachloride is an industrial liquid solvent. It is made by combining methane gas with elemental chlorine. These react to form carbon
  74. Chemistry

    How many grams of glycine amide (FM 74.08) should be used with 1.0 gram of glycine amide HCl (FM 110.54, pKa=8.20) to give 100 mL at pH 8.0? The buffer equilibrium reaction is: GlycineAmideHCl GlycineAmide + H+ which has the general form: BH+ B + H+ I'm
  75. Chemistry

    "How many grams of the precipitate will form if 25.5 mL of 4.5 M solution of lead (II) nitrate is allowed to react with 35.5 mL of 3.0 M solution of potassium chloride? What is the concentration of the excess reactant after the reaction has reached
  76. organic chem

    Please help! It's one of the prelab questions. **Exp. Ethanol from Sucrose The diethylacetal of acetaldehyde can be detected by gas chromatography. How does this impurity arise in fermentation? **Exp. Acetaminophen In the reaction between p-aminophenol and
  77. Chemistry

    An structural isomer of bromobutane (C4H9Br) can be hydrolysed using aqueous sodium hydroxide to produce butanol. This can be represented by the following equation: C4H9Br(l) + OH-(aq)  C4H9OH(l) + Br-(aq) This reaction was investigated experimentally
  78. Science

    1. Massive amounts of destructive energy are released when a nuclear fission bomb explodes. Where does that energy come from? a) A chain reaction occurs when uranium atoms split, releasing nuclear energy. b) Molecules break down, releasing chemical energy.
  79. Physics

    If a supersaturated sugar solution is allowed to evaporate slowly, sugar crystals form in the container. Hence, sugar molecules go from a disordered form (in solution) to a highly ordered, crystalline form. Does this process violate the second law of
  80. Chemistry

    3. An electrochemical reaction occurs between an unknown element and zinc. The half-cell reaction for the zinc is: Zn(s) → Zn2+(aq) + 2e− The cell potential for the reaction is Eºcell = 1.83 V. a. Is the reaction spontaneous or nonspontaneous?
  81. Chemistry; Stoichiometry

    Consider the reaction 2Al + 3CuSO4 = Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess CuSO4? 1. 70.6 g 2. 57.2 g 3. 129 g 4. 31.4 g Consider the reaction 4As + 3O2 =
  82. chem please help

    What is Gibbs free energy? A. The energy lost as heat to the surrounding molecules B. The usable energy released or absorbed by a reaction C. The energy in the form of kinetic energy in a system D. The energy contained within the bonds of molecules Do not
  83. Chemistry

    the reaction of 6.62g of carbon with excess oxygen yields 13.40g of CO2. what is the percent yield of this reaction
  84. gr10 science

    The products of the reaction are iron (III) hydroxide and sodium chloride. How could I write a word equation for this reaction?
  85. Chemistry

    Predict the products and write a net ionic reaction for the reaction of cadmium chloride and ammonium sulfide.
  86. chemistry

    2 HI(g) H2(g) + I2(g) The reaction above has an initial concentration of 2.00 M HI. (No other species are initially present.) If 22.4% of the HI has reacted when equilibrium is established, calculate Kc for the reaction.
  87. chemistry

    If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given i have absolutly no idea how to do this
  88. chemistry

    A certain reaction has an activation energy of 27.34 kJ/mol. At what Kelvin temperature will the reaction proceed 3.50 times faster than it did at 335 K?
  89. chemistry

    How many liters of HCl are produced by the reaction of 5.7 L of hydrogen with an equal amount of chlorine? The reaction occurs at STP.
  90. Chemistry

    Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.
  91. Chem

    A certain reaction has an activation energy of 66.58 kJ/mol. At what Kelvin temperature will the reaction proceed 4.50 times faster than it did at 289 K?
  92. Chemistry

    for a particular reaction H=-28.4 KJ and S=-87.9 J/K. Assuming these values change very little with temperture, over what temperature range is the reaction spontaneous in the forward direction?
  93. chemistry

    The reaction x products follows Ist order kinetics in 40 minutes the concetration of x changes from 0.1M to 0.025M then the rate of reaction when conc of x is 0.01
  94. Chemistry

    For the reaction HCONH2(g) -->
  95. Chemistry

    A certain reaction has an activation energy of 25.65 kJ/mol. At what Kelvin temperature will the reaction proceed 5.50 times faster than it did at 291 K?
  96. chem.

    A certain reaction has an activation energy of 66.58 kJ/mol. At what Kelvin temperature will the reaction proceed 4.50 times faster than it did at 289 K
  97. Chemistry

    Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.
  98. Science

    If the concentration of AgCl drops from 1.000 M to 0.655 M in the first 30.0 s of the reaction, what is the average rate of reaction over this time interval?
  99. chemistry

    Explain the reaction mechanism of the following reaction by showing the types of bond splitting and atom rearrangements. C + O2 = CO2
  100. chemistry

    A certain reaction has an activation energy of 25.14 kJ/mol. At what Kelvin temperature will the reaction proceed 8.00 times faster than it did at 305 K?