a certain reaction has the following generaln form

74,460 results, page 17

  1. chemistry

    The reaction between solid sodium and iron(III) oxide is one in a series of reactions that inflates an automobile airbag. 6 Na(s) + Fe2O3(s) 3 Na2O(s) + 2 Fe(s) If 171.0 g Na and 213.5 g Fe2O3 are used in this reaction, what is the mass of excess reactant that remains after ...
  2. Chemistry

    The reaction between solid sodium and iron(III) oxide is one in a series of reactions that inflates an automobile airbag. 6 Na(s) + Fe2O3(s) 3 Na2O(s) + 2 Fe(s) If 171.0 g Na and 213.5 g Fe2O3 are used in this reaction, what is the mass of excess reactant that remains after ...
  3. Chemistry

    Mercury dissolves in concentrated nitric acid, with the evolution of a reddish-brown gas, just as in the reaction shown in figure 5.4 on page 188 for copper. The oxidation state of the mercury after reaction is +2. Write a balanced net ionic equation for the reaction?
  4. Chemistry

    Mercury dissolves in concentrated nitric acid, with the evolution of a reddish-brown gas, just as in the reaction shown in figure 5.4 on page 188 for copper. The oxidation state of the mercury after reaction is +2. Write a balanced net ionic equation for the reaction?
  5. Math (Please help!!)

    Given A(-4,-2), B(44), and C(18,-8, answer the following questions Write the equations of the line containing the altitude the passes through B in standard form. Write the equation of the line containing the median that passes through point C in slope-intercept form Write the ...
  6. Chemistry

    Question 2 - Liquid vitamin C, (ascorbic acid) C6H8O6 , readily reacts with atmospheric oxygen, O2, to form liquid dehydroascorbic acid, C6H6O6 and water. a) Explain why this is a chemical reaction. b) Write a balanced equation for this reaction. c) How many mole of oxygen gas...
  7. Chem

    Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.30 g of sodium carbonate is mixed with one containing 3.00 g of silver nitrate. How many grams of each of the following compounds are...
  8. chemistry

    25. Which of the two reactions, A or B is a neutralization reaction? Explain why. A. HBr + H2O = Br- = H3O+ B. HClO + NaOH = NaClO + H2O 26. A. Look at the reaction again. when this reaction is reversed. Br- + H3O+ = HBr = H2O what substance is the acid, what is the base. B. ...
  9. Chemistry Kinetics

    If I had the equation H2 + I2 --> 2HI could I write the rate of reaction as d[H2 + I2]/dt = k[H2]^x[I2]^y were x is the order of reaction with respect to x and y is just the order of reaction with respect to y thanks
  10. Math

    Okay, Calculate. Write each answer in exponential form and in standard form. 1.) 3^2*2^3 2.) 2^5/2^3 3.) (3^2)^3 I dont' understand, Its already in exponential form.
  11. English

    How does one cite from this form in APA form? I want to use something that would work for me but I don't know how to cite from this form. Please help.
  12. Maths

    For logarithms, if asked to write in simplest form, is it better to write the argument in radical form or exponential form.
  13. Chemistry

    How would you exactly start the first problem? My thermodynamic skills is a bit rusty. I am assuming I have to use ΔH°f under the given reaction..? But then..we barely covered ΔG° in class. Am I to use this equation, ΔG° = ΔH° - T ΔS°? Umm..can ...
  14. Pre-Calculus

    Consider the chemical reaction aC2H6 + bCO2 + cH2O → dC2H5OH, where a, b, c, and d are unknown positive integers.? The reaction must be balanced; that is, the number of atoms of each element must be the same before and after the reaction. For example, because the number ...
  15. Chemistry

    Which of the following would involve the largest production of heat per mole? a)the burning of gasoline b)the evaporation of water c)the fission of uranium d)the freezing of water e)the rusting of iron Is it C) Which of the following would involve the greatest absorption of ...
  16. chem- to clarify....

    "How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative proportions of the ...
  17. chemistry

    A mole of reacts at a constant pressure of 43.0atm via the reaction Before the reaction, the volume of the gaseous mixture was 5.00L . After the reaction, the volume was 2.00L . Calculate the value of the total energy change, , in kilojoules.
  18. Chemistry

    A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 55.6 kJ of heat. Before the reaction, the volume of the system was 7.60 L. After the reaction, the volume of the system was 2.00 L. Calculate the total internal energy change, Delta U, in kilojoules.
  19. Chemistry

    a chemist runs a chemical reaction at 25 celsius and decides that it proceeds far too repedily. As a result he decides that the reaction rate must be decreased by a factor of 4. At what teperature should the chemist run the reaction to achieve this goal
  20. Chemistry

    a chemist runs a chemical reaction at 25 celsius and decides that it proceeds far too repedily. As a result he decides that the reaction rate must be decreased by a factor of 4. At what teperature should the chemist run the reaction to achieve this goal
  21. chemistry... HELPP

    A gaseous reaction occurs at a constant pressure of 45.0 atm and releases 62.5 Kj of heat. Before the reaction, the volume of the system was 8.60 L . After the reaction, the volume of the system was 3.00 L. Calculate the total internal energy change in kilojoules.
  22. Chemistry

    When a chemist burns ammonia according to the reaction below she finds that the reaction releases heat. (It is exothermic.) 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g) The enthalpy of the reaction DH = -1267 kJ. What is the enthalpy change (in kJ) when 7 grams of ammonia are burned?
  23. Science (Chemistry)

    A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <---> 2H(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: (a) the reaction quotient intially (b) the order of concentration of...
  24. Math

    Write an equation in slope-intercept form, point-slope, or standard form for the line with the given information. Explain why you chose the form you used. a. Passes through (-1, 4) and (-5, 2)
  25. Chemistry

    At a certain temperature, 0.885 mol of N2, and 2.654 mol of H2 are placed in a container. N2+3H2=2NH3 At equilibrium, there is 0.823 mol of NH3 present. Determine the number of mol of N2 and H2 that are present when the reaction is at equilibrium. Answer in moled of N2 at ...
  26. Chem

    At a certain temperature, 0.885 mol of N2, and 2.654 mol of H2 are placed in a container. N2+3H2=2NH3 At equilibrium, there is 0.823 mol of NH3 present. Determine the number of mol of N2 and H2 that are present when the reaction is at equilibrium. Answer in moled of N2 at ...
  27. Chemistry Equation

    In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. I THINK Bob Pursley answered this question a day or so ago. Zinc is higher in the activity series than copper; therefore, Zn will ...
  28. MATH HELP

    1)What is the simplified form of the following expression? 2x^2y+3x^2+4y+3x^2y+2y A)5x^4y^2+3x^2y+2y B)8x^2y+6y^2 C)5x^2y+3x^2=6y D)14x^2y 2)Simplify the following expression 1/3 (21m+27) A)7m+27 B)7m+9 C)63m+9 D)7m+81 3) What is the sum 7/4+(-1/5) A)31/20 B)39/20 C)6/9 D)-7/...
  29. Chemistry

    A reaction of the form aA-----products is second-order with a rate constant of 0.225 L/(mol/s). If the initial concentration of A is 0.293 mol/L, what is the molar concentration of A after 35.6 secs?
  30. Chemistry

    Magnesium is found in the ore,magnesite, MgCO3. The ore decomposes when heated to form magnesium oxide and carbon dioxide. Write the balanced equation for this reaction.
  31. Chem Simple question

    Magnesium metal burns in oxygen to form magnesium oxide, MgO. (a) Write a balanced equation for the reaction Why is it 2Mg+O2->2MgO and not Mg+O->MgO
  32. science help

    Hydrogen gas(H2) and chlorine gas(CL2) react to form hydrochloric acid (HCI). What is the correct balanced chemical equation for this reaction? is it H2 + Cl2 = 2HCl
  33. chemistry

    3-pentanol is heated with sulphuric acid (H2SO4) to become compound M. Compound M is reacted with Br2/ H2O to form Compound N. Outline the reaction step and name the compound M and N
  34. Chemistry

    Sulfuric acid dissolves 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 14.5g . 1.) What minimum mass of H2SO4 would you need? 2.)What mass of H2 gas would be ...
  35. chemisty

    4. N2+3H2----2Nh3 k=1.2 at a T=375C you initially have 0.249mol of N2. 3.21*10^-2mol of H2, and 6.42*10^-4 mol of NH3 in a 3.5L container a.what is the equation to determine the reaction quotient, Q b.determine the reaction quotient Q c. compare Q and K. determine which way ...
  36. chemistry... HELP

    Equilibrium constant question!!!? Standard reduction potentials Reduction half-reaction E(V) Ag+(aq) + e- ---> Ag (s) 0.80 Cu ^2+ (aq) + 2e- ---> Cu (s) 0.34 Sn^4+(aq) + 4e- ---> Sn (s) 0.15 2 H+(aq) + 2e- ---> H2 (g) 0 Ni^2+(aq) + 2e- ---> Ni (s) -0.26 Fe^2+ (...
  37. Chemistry

    MF17083:For the following reaction find Kp at 25°C and indicate whether Kp should increase or decrease as the temperature rises. NH4HS(s) <===> H2S(g) + NH3(g); DH° = 83.47 kJ and DG° = 17.5 kJ at 25°C. - A. B. C. D. E. F. Kp = - A. B. C. D. E. F. Kp ________ as the ...
  38. chemistry

    Consider the following unbalanced reaction. P4(s) + 6F2(g) 4PF3(g) How many grams of F2 are needed to produce 114. g of PF3 if the reaction has a 78.1% yield? i tried it and got this 114g PF3 x (mol PF3/87.97g PF3) x (6 mol F2/ mol PF3) x (38g F2/mol F2)=73.9gF2 then plugged ...
  39. Chenistry check

    Can someone check my answer? The question is: In order for the reaction 2Al(s) + 6HCl(aq)-> 2AlCl3(aq) + 3H2(g) to occur, which of the following must be true? a. Al must be above Cl on the activity series. b. Al must be above H on the activity series. c. Heat must be ...
  40. chemistry

    Calculate the cell potential for the following reaction as written at 51 degrees C, given that [Zn2+] = 0.837 M and [Sn2+] = 0.0180 M. Zn(s) + Sn^2+(aq) = Zn^2+(aq)+Sn(s) E = __ V Reduction Half-Reaction Standard Potential Ered° (V) Zn2+(aq) + 2e– → Zn(s) –0.76 Sn2...
  41. Chemistry

    When the rate of the reaction 2NO+O2=2NO2 was studied, the rate was found to double when the O2 concentration alone was doubled but to quadruple when the NO concentration alone was doubled. Which of the following mechanisms accounts for these observations? a.) Step 1: NO + O2=...
  42. Chemistry

    the type of reaction in a voltaic cell is best described as 1.spontaneous oxidation reaction only 2.nonspontaneous oxidation reaction only 3.spontaneous oxidation-reduction reaction 4.nonspontaneous oxidation-reduction reaction i know its spontaneous, but what else?
  43. 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: Thank you
  44. complex numbers!

    -2-2i in polar form = 2.8 cis 2.35?? -3+4i polar form = 5 cis 2.2??? 1 - sqaureroot(3i) polar form = 2 cis 1.04?? What is cis? never mind I have the right answers. polar form z = r (cos O + i sin O ) is also written in an abbreviated form z = r cis O cos + sin = cis
  45. Chemistry

    Solid copper oxide reacts with ammonia gas according to the following equation: 3CuO + 2NH3 -> 3Cu + N2 + 3H20 50 grams of CuO is placed in an 80L reaction vessel, and the vessel was evacuated. Ammonia gas was then gradually introduced into the vessel, slow enough for the ...
  46. maths

    express each of the following in the form (x+p)^2+q 1. x^2-20x+3
  47. Math

    Express the following in a + bi form: i / (2 + i) Answer a. 2 + i b. (-1/5) - (2/5)i c. 2 - i d. (1/5) + (2/5)i
  48. Math

    What is the explicit form of the following sequence: 1.5, 3.6, 4.2, 5.4, 7.9, 8.3, 8.6, 9.7
  49. algebra

    What is an equivalent form of the following equation 2x-3y=3
  50. algebra

    Which equivalent form following equation 2x-3y=3
  51. algebra

    what is the simplified form of the following question? 7m^2+6.5n-4n+2.5m^2-n
  52. Algebra 1

    What is the simplest form of following expression -(8n-5v)
  53. Math

    What is the simplified form of the following expression? 2x^2y + 3x^2 + 4y + 3x^2y + 2y
  54. Math

    What is the simplified form of the following expression? -(7x – 4y)
  55. Physical Science

    Predict how each of the following changes will affect the following reaction involving gaseous reactants and products: 2NO2 = N2O4 + heat a. the temperature is increased. b. the pressure is increase. c. N2O4 is removed from the equilibrium mixtur. d. NO2 is added to the ...
  56. Chem

    Arrange the three metals(Cu, Zn, and Mg) in order of their relative strengths as reducing agents, placing the strongest first. Arrange the three metallic ions ( Cu(No3)2, Zn(No3)2, and Mg(No3)2 ) in order of their relative strengths as oxidizing agents, placing the strongest ...
  57. chem!

    Arrange the three metals(Cu, Zn, and Mg) in order of their relative strengths as reducing agents, placing the strongest first. Arrange the three metallic ions ( Cu(No3)2, Zn(No3)2, and Mg(No3)2 ) in order of their relative strengths as oxidizing agents, placing the strongest ...
  58. AP Chem (Conceptual Questions)

    Hey guys! If you could just please, look over a few of these conceptual problems because I'm pretty confused? (I put what I think is the answer below each question). Thank you for any help in advance!!!! A.Which statement *does not* apply to a heterogeneous catalyst? 1.It is ...
  59. Math

    Hello, I'm doing a review sheet for math and a certain question states: "solve: ln(3/4)" What should I take solve to mean? Do I just change it's form to ln(3/4) = ln3 - ln 4 ? Or, perhaps, I need to actually enter in the value into a calculator. How would you take on this ...
  60. chemistry

    The reaction SO2 + H2O =H2SO4 Is the last step in the commercial production of sulfuric acid . the enthalpy change for this reaction is -227 KJ . In designing a sulfuric acid plant is it necessary to provide for heating or cooling of the reaction mixture ? explain
  61. Engineering Chemistry

    One reaction that destroys O3 molecules in the stratosphere is NO + O3 → NO2 + O2 When this reaction was studied in the laboratory, it was found to be first order with respect to both NO and O3, with a rate constant of 1.9 x 104 L mol-1 s-1. If [NO] =1.2 x 10-5 mole L-1 ...
  62. Chemistry

    The equation for fermentation of glucose to alcohol and carbon dioxide is C6H12O6= 2C2H5OH + 2CO2 The enthalpy for the reaction is -67kj. Is the reaction endothermic or exothermic? Is the heat energy absorbed or released as the reaction occurs? I think its endothermic but im ...
  63. Chemistry (electron transfer)

    MnO4^– + SO3^2– + H2O → MnO2 + SO4^2– + OH^– If the reaction occurs in an acidic solution where water and H+ ions are added to the half-reactions to balance the overall reaction, how many electrons are transferred in the balanced reduction half-reaction? The answer I...
  64. Chemistry

    Ethane, C2H6, forms ·CH3 radicals at 700.°C in a first-order reaction, for which k = 1.98 h-1. (a) What is the half-life for the reaction? (b) Calculate the time needed for the amount of ethane to fall from 1.00 10-3 mol to 2.48 10-4 mol in a 500. mL reaction vessel at 700...
  65. Chemistry

    The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm . The reaction occurs in a 1.29-cm sample cell, and the only colored species in the reaction has an extinction coefficient of 5700 cm-1M-1 at 520 nm . a) ...
  66. Chemistry

    The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm . The reaction occurs in a 1.29-cm sample cell, and the only colored species in the reaction has an extinction coefficient of 5700 cm-1M-1 at 520 nm . a) ...
  67. ap chemistry

    Which of the following rate laws is possible for the following two-step reaction? 1) NO(g) + NO(g) N2O2(g); FAST 2) N2O2(g) + O2(g) 2NO2(g); SLOW Net: 2NO(g) + O2(g) 2NO2(g); A. k[N2O2][NO] B. k[NO]2 C. k[N2O2][O2] D. k[NO][O2] help!!!!! i don't know how to figure this out
  68. ap chemistry

    I have a lot of questions actually. it's electrochemistry (which is obviously a bunch of fun) 2 electrodes Cr(s)/Cr3+ and Sn(s)/Sn2+ are combined to afford a spontaneous electrochemical reaction. the standard reduction potention in V for Cr3+ and Sn2+ are -.74 and -.14 V ...
  69. L.A

    Read the following stage directions and dialouge from billy Elliot: [Billy suddenly sees DAD and freezes. His reaction puzzles Mrs. Wilkinson for a second. The music comes to a standstill. Mrs. Wilkinson turns to see Dad.] DAD: You.Out.Now What most likely motivates Billy's ...
  70. chemistry

    What element is undergoing reduction in the following reaction? Zn(s) + AgNO3(aq) --> Zn(NO3)2 + 2 Ag(s)
  71. chemistry

    Determine the delta H for the following reaction C3H4(g) + 2H2(g) --> C3H8(g)
  72. chemistry

    the reaction with ammonium hydroxide with the following metals: Fe3+ Mn2+
  73. CHEM

    At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) 2 SO3(g) What is the value of K at this temperature?
  74. CHEM

    At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) 2 SO3(g) What is the value of K at this temperature?
  75. chemistry

    calculate the value of the equilibrium constant K for this reaction A+B <--> C from the following information 3C <--> D Kc= 7.1*10^-4 D <--> 3A + 3B Kc= 2.9*10^-2
  76. chemisrty

    What is ΔGo at 1000 oC for the following reaction? CaCO3 (s) CaO (s) + CO2 (g)
  77. chemistry

    how does an increase in pressure affect the following reaction? C2H2(g)+H2(g) C2H4(g)
  78. chemistry

    Balance the following redox reaction. MnO4 (aq) + Fe (s) --> Mn2+ (aq) +Fe2+ (aq)
  79. chem

    Determine the equilibrium constant for the following reaction. 2 Fe3+(aq) + H2(g) 2 Fe2+(aq) + 2 H+(aq)
  80. Chemistry

    write a sentence for the following reaction PCl5(s)=PCl3(s)+Cl2(g)
  81. Chemistry

    How do I balance the following reaction in acidic conditions? N2O4 + S8 = NO + H2SO3????
  82. physics

    Complete the following nuclear reaction: ^16,v8 O + ^4, v2 He → ________ + ^19, v10 Ne 1p 1n 2H 3H
  83. Science

    Which one of the following factors would not speed up a chemical reaction
  84. Chemistry

    What is the oxidized substance in the following reaction? Fe + 2HCl → FeCl2 + H2
  85. Chemistry

    Write the Kc expression for the following reaction: Fe3+ + SCN- = FeSCN2+
  86. Chemistry

    When 0.100 mol of carbon is burned in a close vessel with 8.00g of oxygen, how many grams of carbon dioxide can form? Which reactant is in excess, and how many grams of it remain after the reaction?
  87. Chemistry

    When 0.100 mol of carbon is burned in a close vessel with 8.00g of oxygen, how many grams of carbon dioxide can form? Which reactant is in excess, and how many grams of it remain after the reaction?
  88. chemistry

    For the reaction between nitrogen and oxygen to form nitric oxide, beginning with 0.067 mol of N2, N2(g) + O2(g)= 2 NO(g) a. how many moles of O2 are required to completely consume the N2? b. how many moles of NO are obtained when the N2 is completely reacted?
  89. chemistry

    9. The reaction of 50 mL of N2 gas with 150 mL H2 gas to form ammonia via the equation: N 2(g) + 3H2 (g) → 2NH3 (g) will produce a total of mL of ammonia if pressure and temperature are kept constant
  90. Criminal Justice

    Which one of the following is NOT a method for developing invisible fingerprints during a crime scene search for evidence? A. Powders B. Rolling C. Chemicals D. Fuming is it B 2. Information obtained during an interview and recorded in an investigator's field notes is ...
  91. Chemistry: Answer check please!

    1. Reactions follow the law of conservation of mass. a.) True b.) False Answer: True 2. Reactants are the materials used in a chemical reaction. a.) True b.) False Answer: True 3. In a chemical equation, the mass on the left of the arrow equals the mass on the right. a.) True ...
  92. math

    Month J F M A M J J A S O N D TOTAL 0 0 0 0 1 21 27 16 12 2 0 0 The chart above represents the monthly rainfall in inches in Calcutta in a certain year. Calculate and explain the significance of the following measures based on this data.
  93. calculus maths

    Hi can some one help, explain the following please. I seem to have issues with this: 1- Find the corresponding particular solution (in implicit form) that satisfies the initial; condition y = when x = 0. 2- Find the explicit form of this particular solution. 3- What is the ...
  94. Chemistry

    Which of the following is a condensation reaction? Two monomers combine when one adds to the double bond of another. Two monomers break away when one forms a double bond. Two monomers break away with the addition of a water molecule. Two monomers form a new bond with the loss ...
  95. chemistry

    The following reaction is used to produce tungsten(VI)oxide: WS3(s) + O2(g) → WO3(s) + SO2(g) The WO3 is then heated and undergoes a decomposition reaction produce tungsten and oxygen gas. How many grams of tungsten could be produced if 16.91 grams of WS3 are used? How ...
  96. AP Chemistry

    Consider the following reaction. CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what are the equilibrium concentrations of Ca2+ ...
  97. Chemistry

    Consider a one step reaction. Which of the following does not describe the activation energy of the process? The minimum amount of energy needed for a reaction to occur The energy difference between the starting point and the transition state The energy difference between the ...
  98. chemistry

    what can we say about the EA for an exothermic reaction? a...must be <0 b...greater for reverse reaction c...greater for forward reaction d...can't say anything
  99. Chemistry

    2A + 3B + C ⟶ D + E The rate constant for this reaction is 0.25, and the reaction is second order in A and is first order in B and C. Which option correctly gives the rate of the reaction if [A] is 0.4 M, [B] is 0.1 M and [C] is 0.2 M?
  100. why will no one answer? chem

    The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which one of the following ...
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