a certain reaction has the following generaln form

74,413 results, page 34

  1. Chemistry

    In the formation of acid rain, sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid. Write the balanced chemical equation for the reaction. 2 SO2 + 1 O2 + 2 H2O --> 2 H2SO4 If 5.45 g SO2 react with excess oxygen and water, how many grams of H2SO4 are...
  2. chemistry

    Examine the scenario. A magnesium (Mg) atom gives one electron to two atoms of another element, and takes on a 2+ charge. The two atoms of the other element each form a 1− charge. As a result, the magnesium ion and the two ions of the other element attract and form an ionic ...
  3. chemistry

    If H2SO4 were added to the following, would it form a salt, if so what is the name of the salt? NaCl Ca(OH)2 Hf AlCl3 H2O Mg(OH)2
  4. Grammar

    What is the possessive form of democracy in the following sentence. Would democracy followers win the struggle. Is it democracies'
  5. Calculus

    For the following integral find an appropriate TRIGONOMETRIC SUBSTITUTION of the form x=f(t) to simplify the integral. INT (x^2)/(sqrt(7x^2+4))dx dx x=?
  6. Math

    Convert each of the following repeating decimals to form, where a, b are integers and b „j 0 a) 0.4 with line on the four b) 1.396 with line on the six
  7. math

    write each of the following in decimal form: (a) 5x100+2x10+7+4x0.1+8x0.001 ________________________________ (b)... ________________________________
  8. Math

    Express the following in roster form: Set M is the set of natural numbers between fourteen and nineteen.
  9. Intermediate Algebra

    Simplify the following exponents and rewrite it in an equivalent form with positive exponents..24x^3y^-3/72x^-5y^-1
  10. College Algebra

    Find all zeros of the following polynomial. Write th polynomial in factored form. f(x) = x^4 - 256
  11. maths

    write the following expression ,if possible, as apolynomial in the form a, (xcube - xfourth + 2x +1)-(xfourth + x cube - 2xraised2 +8
  12. chemistry

    enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction 2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this reaction. Explain how this information allows you to determine the spontaneity or non-spontaneity of this reaction at any temp (S for PH3 is ...
  13. Chemistry

    Help required- Urea, CO(NH2)2, is the excreted form of excess nitrogen in most vertebrates. In urinary infections, urease, released by microbial pathogens, degrades urea into CO2 and ammonia in the bladder. a) write a balanced equation of the reaction, b) write equations for ...
  14. Science

    Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...
  15. ap chemistry

    Some reactions that are predicted by their sign deltaG to be spontaneous at room temperature do not proceed at a measurable rate at room temperature. A suitable catalyst increases the rate of such a reaction. What effect does the catalyst have on deltaG for the reaction? AND ...
  16. Biology

    1. Which of the following is not a characteristic of life? A. maintains homeostasis *** B. composed of cells C. composed of atoms D. carries out metabolism 2. Which of the following must be true to consider something to be alive? A. It must be able to replicate its DNA. B. It ...
  17. 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...
  18. Chemistry II

    If 36.0 mL of 7.0e-4 M HClO4 is added to 19.5 mL of 8.2e-4 M LiOH, what is the pH of the solution? Write the equation. Calculate mols HCLO4. Calculate mols LiOH. Determine how much of which reagent remains after the reaction. pH = -log(H^+) post your work if you get stuck. ...
  19. chemistry

    The synthesis of urea by Frederich Wöhler in 1825 began the decline of the idea that "organic" chemicals could only be made by living organisms as part of their biological processes. AgOCN(aq) + NH4Cl(aq) → AgCl(s) + NH2CONH2(aq) If you perform this reaction and collect...
  20. Math: Trig

    Help with vectors, please. Thanks 1) Express point in rectangular form. Give EXACT answer, if possible? (2, 4π /11) 2) Given P = (2. -3) and Q = (-3, -4). find the component form of vector PQ 3) The vector v has a magnitude of 25 inches and a direction of 32° , Express ...
  21. chem

    The reaction A + B „³ C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?
  22. chemistry

    The reaction A + B --> C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?
  23. chemistry

    What is the enthalpy for reaction 1 reversed? reaction 1 reversed: 2CO2+3H2O=C2H5OH+3O2 express the answer in kJ/mol
  24. science

    If a temperature increase from 19.0 degrees C to 36.0 degrees C triples the rate constant for a reaction, what is the value of the activation barrier for the reaction?
  25. AP Chemistry

    redox reaction: Hydrogen peroxide is added to an acidified solution of potassium permanganate. what is the total redox reaction?
  26. science

    For the reaction mc011-1.jpg at 472°C equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37 x 10-8M. What is the equilibrium constant for this reaction
  27. Chemistry

    A reaction A(aq)+B(aq)<-->C(aq) has a standard free-energy change of –3.35 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively?
  28. Chemistry

    A reaction has a standard free-energy change of –4.60 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively?
  29. Chemistry

    If a temperature increase from 11.0∘C to 22.0∘C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction?
  30. Chemistry

    Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant
  31. Chemistry

    Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant
  32. chemistry

    The value of Change in heat for the reaction below is -790 KJ. Calculate the enthalpy change accompanying the reaction of .95 g of S. 2S(s) + 3 O2 --> 2 SO3(g)
  33. science

    AgNO3+NaCL=AgCL+NaNO3 is not a redox reaction but Cu+2AgNO3=2Ag+Cu(NO3)2 is a redox reaction.explain
  34. Chemistry

    What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) A) 0.60 g B) 5.7 g C) 1.2 g D) 2.9 g
  35. chemistery

    explain the progress of the reaction in terms of kinetic energy explain how various factor affect the rate of reaction
  36. science

    explain the progress of the reaction in terms of kinetic energy. explain how various factor affect the rate of reaction. any help thanks
  37. Chemistry

    How do I do these? 1. Balance the equation for the reaction between zinc and hydrochloric acid. Zn + HCl ZnCl2 + H2 2. Balance the equation for the reaction between iron (steel wool) and oxygen (water). Fe + O2 Fe2O3 3. Balance the equation for the reaction of hydrogen ...
  38. Spanish: Please check answers

    Please check my answers. The nswers are at the bottom. 3. Fill in the blank with the correct form of the verb: yo/dormir. yo _________ 4. Fill in the blank with the correct form of the verb: ella/devolver. ella _________ 5. Fill in the blank with the correct form of the verb: ...
  39. 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.
  40. science-chemistry

    how do the following changes affect the speed of a reaction? a)Increasing the concentration of the reactans. b)Decreasing the temperature. c)Decreasing the partickle size of a solid reactant.
  41. 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
  42. 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?
  43. 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?
  44. 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)
  45. 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?
  46. 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?
  47. 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
  48. 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
  49. 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?
  50. Physics

    Engineering 100 Homework Problem #1 Below is a diagram of a beam supported on the left end by a pin connection, and toward the right side by a simple fulcrum. A force F is applied to the far right end of the beam as shown. The uniform beam has mass, m, length, l, and the ...
  51. teacing in early childhood programs

    authoritative teachers tend to do all of the following except a.explain why some behaviors are appropriate and acceptable and others aren't b.encourage and reword certain behaviors. c. focus most of their comments to children on what they've done wrong. d. inform children of ...
  52. History

    Which of the following is NOT associated with El Nino? Fish that thrive in cold Pacific waters are driven away**** Areas that usually have dry weather get heavy rains or are flooded Drought plagues certain peoples in South America All of the above are associated with El Nino
  53. Trig (math)

    1.) Write the complex number in trigonometric form r(cos theta + i sin theta) with theta in the interval [0°, 360°). 9 sqrt 3 + 9i 2.) Find the product. Write the product in rectangular form, using exact values. [4 cis 30°] [5 cis 120°] 3.) [4(cos 135° + i sin 135°)][6(...
  54. Equilibrium concentrations, please help!!!

    Lead metal is added to 0.150 M Cr3+(aq). Pb(s)+2Cr3+(aq)⇌Pb2+(aq)+2Cr2+(aq). KC=3.2×10−10 What is [Pb2+] when equilibrium is established in the reaction? What is [Cr2+] when equilibrium is established in the reaction? What is [Cr3+] when equilibrium is established in the ...
  55. chemistry

    "However, the Ag^+ + I^- reacted to give AgI (but that is not a redox reaction) and if they reacted why didn't Br^- and Ag^+?" Hi Dr.Bob, I am also given additional information for reaction #1 Cu(s) I-(aq) Ag(s) Br- (aq)
  56. Chemistry

    making 2 moles of No in a reaction requires 180KJ of energy. How much No will be made if this same reaction absorbel 950KJ OF ENERGY
  57. chem

    When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?
  58. Chemistry

    A reaction has a standard free-energy change of –12.40 kJ mol–1 (–2.964 kcal mol–1). Calculate the equilibrium constant for the reaction at 25 °C.
  59. chemistry

    For a particular redox reaction NO is oxidized to NO3^– and Cu^2+ is reduced to Cu. Complete and balance the equation for this reaction in basic solution: NO + Cu^2+ --> NO3^- + Cu^+ help. thanks.
  60. Chemistry

    A reaction has a standard free-energy change of –12.40 kJ mol–1 (–2.964 kcal mol–1). Calculate the equilibrium constant for the reaction at 25 °C.
  61. 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
  62. AP Chemistry

    Choose a chemical reaction involving two or more reactants. For this reaction, how do you determine which reactant or reactants are limiting? Explain.
  63. Chemsitry

    Write the chemical reaction that is responsible for the pH of a buffer which contains NH3 and NH4Cl. Write the reaction in such a way that is appropriate for a Ka. Thank you!
  64. chemistry

    The reaction A + B to C + D is second order in A and zero order in B. The value of k is 1.10×10−2 M^{-1}\;min^{-1}. What is the rate of this reaction when A}]=0.124 M and B}]=3.89 M?
  65. chemistry

    The reaction A + B to C + D is second order in A and zero order in B. The value of k is 1.10×10−2 M^{-1}\;min^{-1}. What is the rate of this reaction when A}]=0.124 M and B}]=3.89 M?
  66. Chemistry

    what is the balanced equation of: Combination reaction: Li2O(s)+H2O(l)-->(?) I know what a combination reaction is but I don't know how to do it when it is complex like this one.
  67. Chemistry

    What would the equation be for the reaction between potassium permanganate and cyclohexene. I know it's a oxidation reaction but not sure of the equation.
  68. Ochem

    Diethyl ether is used as a solvent for the reaction of diethylamine with m-toluoyl chloride. Why is a solvent necessary for this reaction?
  69. chemistry

    the reaction of N2+3H2-->2NH3 is used to produce ammonia commercially. if 1.40 g of N2 are used in the reaction, how many grams of H2 will be needed?
  70. Biology

    Hydrolysis uses a catabolic reaction. Explain what a catabolic reaction is and how it is useful in creating monomers from polymers.
  71. Biology

    Hydrolysis uses a catabolic reaction. Explain what a catabolic reaction is and how it is useful in creating monomers from polymers.
  72. Chemistry

    In the reaction 2A+B2 to 2AB if 0.5 moles of A and an excess of B are combined and the reaction goes to %100 completion, then how many moles of C are formed?
  73. Chemistry

    For the reaction C2H4Br2+ 3KI>C2H4+2KBr+KI3, when the rate of reaction is 2.0x10^-5, what is the rate of disappearance of KI?
  74. chemistry

    please assist me with this themochemistry question Given the following data CaCO3 (s)>>>>>>CaO (s) + CO2(g) (g) Delta H = -178.1 kj C (s) + O2>>>>>>CO2 (g) Delta H = -393.5 kj Calculate enthalpy in kj of the following reaction CaCO3 (s)>&...
  75. Physics Help

    It starts saying that impulse is related to velocity in a certain way. What is that relationship? I just said impulse = force x time and momentum = mass x velocity So would that be a correct answer to what they're wanting? Also, it says there is a relationship to be found ...
  76. Chemistry

    Calculate E°cell (in volts) for a fuel cell that employs the reaction between methane gas and oxygen to form carbon dioxide and water. (to 4 significant figures) ∆G⁰f for CH4 = -50.5 kJ/mol ∆G⁰f for CO2 = -394.4 kJ/mol F = 96485/mol e- I got 0.4455 V ...
  77. Chemistry

    Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3 NO2 (g)+ H2O (l) --> 2HNO3 (l) + NO (g) Suppose that 5 mol NO2 and 1 mol H2O combine and react completely. How many moles of the reactant in excess are present after ...
  78. math

    A fireplace arch is to be constructed in form of a semiellipse. The opening is to have a height of 2 feet at the center and a width of 6 feet along the base. The contractor cuts a string of a certain length and nails each end of the string along the base in order to sketch the...
  79. Chemistry

    Help me set up this problem. I have been looking at a few examples of similar problems and I keep getting the wrong answers. I'm getting really confused. Q: The standard free energy change ΔG∘ and the equilibrium constant K for a reaction can be related by the ...
  80. Chemistry (Check)

    In a calorimeter experiment done at constant pressure in which all the heat from a chemical reaction was absorbed by the surrounding water bath, the temperature of the water went up by 2.31 K. If the size of the water bath was 200 g, what was the amount of heat transferred to ...
  81. Chemistry

    HELP£¡ can someone find identify one chemical reaction that C4H4O4 is involved in. Or the synthesis of the compound? C4H4O4 is a formula that applies to both maleic and fumaric acid. A synthesis reaction of reaction of maleic acid is: Maleic acid anhydride + water => ...
  82. chemistry

    The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> and <-- FeSCN2+(aq) A. A heterogeneous equilibrium exists because of the charged ions. B. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. C. The ...
  83. chemistry

    The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> FeSCN2+(aq) A. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. B. The equilibrium constant is Kc = [Fe3+][SCN–][FeSCN2+] C. A heterogeneous equilibrium...
  84. Separation of Racemate- Chemistry Lab

    Compare the relative reaction rates of 1-bromobutane, 2-bromopropane, and 2-bromomethylpropane under SN1 reaction conditions. Silver nitrate will be used to provide nitrate ion as the nucleophile to produce alkyl nitrates as products. 1) I found the answer for this one. 2) You...
  85. chemistry

    Give the balance chemical reaction from the following decays.(a) loss of B^+ by ^15,8 O (b) loss of B^- by ^Ag (c) loss of * by ^46,62Sn
  86. Medical Billing and Coding

    What form should be attached to a CMS-1500 claim form submitted to a secondary insurance company?
  87. maths/ physics

    Determine the two square roots of 3+j4 in both a)Cartesian form b) Polar form Any help with this question would appreciated
  88. HCR/220

    In your opinion does the HIPPA 837 form have more pertinent information than CMS-1500 form when submiting.
  89. physics/optics

    Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve
  90. Trigonometry

    rectangular form to polar form xy=12 rsinÆŸ rcosÆŸ=12 would the answer be: r^2=12/cosÆŸ sinÆŸ please show steps, Thanks
  91. 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+ <--- Ka --->...
  92. 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?
  93. Chemistry

    A reaction A+B---> C has a standard free energy change of -5.13 kj/mol at 25 degrees celcius, What are the concentrations of A, B, and C at equilibrium if at the beginning of the reaction there concentrations are .3M, .4M, and 0M respectively?
  94. Chemistry

    2NO(g) + H2(g) --> N2O(g) + H2O(g) + energy. 1. Assume the reaction is reversible and at equilibrium. What shifts in the equilibrium of this reaction are suggested by Le Chateliers Principle?
  95. Chemistry

    the standard free energy change for a chemical reaction is +13.3 kj/ mol. What is the equilibrium constant for the reaction at 125 degree C ? (R= 8.314 j/mol )
  96. chemistry(Please Check)

    CaCl2(aq)+Na3PO4(aq) -----------> Ca3(PO4)2(s) +NaCl(aq)4) If the “H” for this reaction is -45.5 kJ/mol, is the reaction endo- or exothermic? Exothermic
  97. 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?
  98. Chemistry

    For the reaction 2NH3(g) 3H2(g) N2(g) at 472oC equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37x10^_8 M. What is the equilibrium constant for the reverse reaction?
  99. Chemistry

    The balanced reaction equation for the combustion of heptane, C7H16, is given below. If the reaction produced 37.5 g CO2, how many grams of heptane were burned?
  100. Grammar

    The following senetences are inverted. Write C if the subject-verb agreement is correct. Write I if the subject-verb agreement is incorrect. Then, on the line following each sentence, write the correct form of the verb. 1. Was Lyndon Johnson the next President? -- ? 2. Are ...
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100