a certain reaction has the following generaln form

74,460 results, page 23

  1. chemistry

    How many moles of O are needed to combine with 0.223 mole of C to form the following compounds? CO CO2
  2. Maths

    Express each of the following in the form Rsin(x+a), where r>0 and 0< a <2pi (a) 5cosx + 12sinx (b) 12cosx + 5sinx
  3. math

    can you put the following nmbers in order form least to greatest? 17.11; 17.107; 17; 17.001
  4. math

    If A =4 B=8, calculate the following (show your answer either as a fraction (lowest) or in decimal form): a) A+B ---- A
  5. math

    If A =4 B=8, calculate the following (show your answer either as a fraction (lowest) or in decimal form): (A+B)² ------- A
  6. math

    If A=4 and B=8, calculate the following (show your answer either as a fraction (lowest) or in decimal form A² + B² -------- A²
  7. Math

    Without adding ,write the following in standard form 70+400+2+3000+80000=
  8. IPC

    Which of the following elements is not likely to form bonds? gold oxygen neon mercury
  9. algebra

    find a polynomial f(x) of degree 4 that has the following zeros: 0,7,-4,5 Leave your answer in factored form
  10. Math

    Solve the following system of equations. Then, write the final answer in (x, y, z) form. -12x+y-x=-20 -2x-4y+2z=10 x+2y+2z=25
  11. Math

    write the following equation in slope intercept form 3x+4y=12 Could someone explain how to do this problem?
  12. math

    Write the equation in standard form, given the following information. vertex(-2,4), directrix y=1
  13. Algebra2

    What is the equation, in standard form, of a parabola that contains the following points? (-2,-20),(0,-4),(4,-20) 1- y=-2.5x^2+5x 2-y=-x^2+4x-4 3- y=-2x^2+4x-4 4-y=-2.25xx^2+4.5x-2 My answer is 3
  14. math

    the absolute value of a certain integer is greater than 3 and less than 6. which of the following could not be 2 less than the integer? A)-7 B)-6 C) 2 D) 3 E) 4
  15. Chemistry

    A 1.0 mL volume of 0.010 M H2SO4 is added to a mixture of 6 drops of 0.010 M HIO3, 14 drops of deionized water, and 1 drop of starch solution. A color change in the reaction mixture occurred after 56 seconds. a. Assuming 20 drops per milliliter for all solutions, determine the...
  16. chemistry 101

    Consider the following reaction. CaO (s) + CO2 (g) = CaCO3 (s) A chemist allows 14.4 g of CaO and 13.8 g of CO2 to react. When the reaction is finished, the chemist collects 19.4 g of CaCO3. Determine the limiting reactant, theoretical yield, and percent yield for the reactio ...
  17. chem

    Balance the following oxidation-reduction reaction in acid solution: SO32- + MnO4- --> SO42- + Mn2+ + H2O
  18. chemistry

    Write a reaction showing what happens to the following in water and identify te conjugate pairs. C6H5NH3 CO3_-2 HCOOh
  19. chemistry

    The following reaction consumes 2.15 kg of Co(g): Co(g) + H2O(g) --> CO2(g) + H2(g) How many total liters of gas are formed if the products are collected at STP?
  20. chemistry

    The following reaction consumes 2.15 kg of CO(g): CO(g) + H2O(g) --> CO2(g) + H2(g) How many total liters of gas are formed if the products are collected at STP?
  21. Chemistry

    Hydrofluoric acid etches glass by reacting with the silica in it according to the following equation. H° = 54.5 kJ and S° = 436.5 J/K Calculate G° at 25°C for this reaction.
  22. chemistry

    Which of the following is true for the gas phase reaction shown below? 4NH3(g) + 5O2(g) ¨ 4NO(g) + 6H2O(g), ƒ¢H = -0.905 kJ
  23. Chemistry

    In the following reaction, it 13g of sodium are reacted how many grams of copper(solid) can be obtained? 2Na(s)+ Cu(NO3) 2 - - > 2NaNO3 + Cu(s)
  24. Chemistry

    What is the concentration of the Mg2 ion in solution when [CO3-2] = 0.25M given that the Ksp= 6.82 x 10-6 for the following reaction MgCO3-------->Mg +. CO32-
  25. Chemistry

    How much heat is associated with the burning of 2.27 g of methane in the following unbalanced reaction: CH4(g) + O2(g) →CO2(g) + H2O(g)?
  26. chemistry

    given the following data: S(s)+3/2 O2(g)->SO3(g) H=-395.2 kj 2SO2(g)+ O2(g)->2SO3(g) H=-198.2kj calculate H for the reaction S(s)+ O2(g)->SO2(g)
  27. Chem

    Balance the following redox reactions in acidic solution by the half-reaction method Br–(aq) + I–(aq) + HClO(aq) = Br2(l) + IO3 + Cl–(aq)
  28. Chemistry

    Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. Mo^3+ -> MoO2^2+
  29. chemistry

    For the following reaction in acidic solution. Cr2O7^2- + I- ---> Cr^3+ + IO3- Give the total balanced net ionic equation.
  30. chemistry

    For the following chemical reaction write the net ionic equation, including the phases. 2HBr (aq) +Ba(OH)2(aq) --> 2H2O(l) +BaBr2 (aq)
  31. Chemistry

    Write the total and net ionic equations for the following molecular reaction: HgNO3 (aq) + NaCl (aq) -> HgCl (s) + 2 NaNO3 (aq)
  32. science

    Based on the oxidation numbers which compound is the oxidizing agent in the following reaction? 8Al + 3KClO4 ¨ 4Al2O3 + 3KCl
  33. Chemistry

    Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 K Cr*** O S
  34. chemistry

    What is the ∆G for the following reaction between O3 and O2? 3O2(g) 2O3(g) Given: O3: ∆H = 285.4 kJ ∆S = -137.14 J/K) 109.5 kJ 208.3 kJ 300.2 kJ 326.3 kJ
  35. CHEMISTRY

    Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ...
  36. CHEMISTRY

    Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ...
  37. CHEMISTRY

    Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ...
  38. CHEMISTRY

    Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (1a) Write a balanced chemical equation for the neutralization reaction upon which ...
  39. CHEMISTRY

    Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (1a) Write a balanced chemical equation for the neutralization reaction upon which ...
  40. Chemistry+balancing equation tips

    We are on combustion reaction at the moment in chemistry, and I have to say, these reactions are like extremely hard to balance(well, just alot of erasing). It takes me a while to balance combustion reactions and I want to know if theres any tips in balancing them? Should I ...
  41. Chemistry

    3) The following set of data was obtained by the method of initial rates for the reaction: 2 HgCl2(aq) + C2O42-(aq) 􀀏 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) What is the rate law for the reaction? [HgCl2], M [C2O42-], M Rate, M/s 0.10 0.10 1.3 × 10-7 0.10 0.20 5.2 × 10-7 0...
  42. chemistry

    For the electrolysis of molten potassium bromide: (a) write the equation for the reaction at cathode. (b) write the equation for the reaction at anode. (c) write the equation for the overall reaction.
  43. Trig

    How do I prove the following Identity? sec x(sec x-cos x)=tan^2x If there is a certain website or suggestion to help with these type of equations I would greatly appreciate it. I've been studying these for a while but still get pretty confused.
  44. Applied Calculus......

    Under a set of controlled laboratory conditions, the size of the population of a certain bacteria culture at time t (in minutes) is described by the following function. P=f(t)=3t^2+2t+1 Find the rate of population growth at t = 9 min.
  45. algebra II

    The following rational function describes concentration in blood of a certain medicine taken once depending on time, find a. the horizontal or oblique asymptote(s), if any, b. the vertical asymptote(s), if any, c. describe their possible meanings. f(x)=4/x+2
  46. Calculus

    The following rational function describes concentration in blood of a certain medicine taken once depending on time, find: A) the horizontal or oblique asymptote B) the vertical asymptote, if any C) describe their meanings f(x)=x/x^2-100
  47. Physics

    An airplane of a certain density and shape flies at a constant speed. To do so, it must fly with a certain velocity v0. If the size of the airplane is scaled up in length, width, and height by a factor of two, it can only fly above a new velocity v1. What is v1/v0?
  48. Cemistry

    Hi, I've been trying to solve this chemical equation for the last 30 minutes and am only confusing myself. I am wondering if the product I obtained is correct. The question is to write a balanced equation for the below reaction and be sure to indicate the states and if there ...
  49. chem

    1.Aqueous solutions of sodium and copper (II) chloride are mixed together. which statement is correct? a. both NaCl and CuS will precipitate from solution b. no precipitate will form c. CuS will precipitate from solution d. NaCl will precipitate from solution e. no reaction ...
  50. Chemistry

    For the reaction 2CO2(g) + 5H2(g)C2H2(g) + 4H2O(g) H° = 46.5 kJ and S° = -124.8 J/K The standard free energy change for the reaction of 1.75 moles of CO2(g) at 328 K, 1 atm would be ___ kJ This reaction is (reactant, product) ____ favored under standard conditions at 328 K. ...
  51. chm

    The equilibrium constant for the equation 2 H2(g) + CO(g) CH3OH(g) Is 19 at a certain temperature. If there are 3.11 x 10-2 moles of H2 and 5.79 x 10-3 moles of CH3OH at equilibrium in a 6.75 L flask. What is the concentration of CO? At 1280 °C the equilibrium constant for ...
  52. Chemistry

    Calculate the concentrations of S2O8 2-, I-, S2O32 2- in moles per litre of reaction mixture given the following: 20mL of 0.1 M (NH4)2S2O8 added to: 20mL of 0.2M KI 10mL of 0.01M Na2S2O3 5mL 0.2% starch Also, calculate -(delta)S2O8 2- that is, how much S2O8 2- is used up (...
  53. chem

    Now the numbers in the question are correct, (Fluorine = 10.10atm Krypton = 1.24atm). Please help. Fluorine and krypton react to form binary compounds when a mixture of the two gases is heated to 500C in a nickel reaction vessel. A 100mL nickel container is filled with fluorin...
  54. chemistry

    a flask is charged with 2.00 atm of nitrogen dioxide and 1.00 atm of dinitrogen tetroxide at 25 degrees celsius and allowed to reach equilibrium.when equilibrium is established, the partial pressure of NO2 has decreased by 1.24 atm. (a) what are the partial pressures of NO2 ...
  55. Calculus (Continuity and Differentiability)

    Okay. So I am given a graph of a derivative. From what I can gather, it looks like the function might be abs(x-2)-4. (I was not given an explicit function for g', just its graph.) The question then goes on to ask me: Is it possible, impossible, or certain that the function g ...
  56. Chemistry

    At 700 k the equilibrium constant Kc for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7*10^6. The rate constant for the reverse reaction at this temperature is 0.54 M^(-1)s^(-1). What is the value of the rate constant for the forward reaction at 700 K?
  57. Chemistry

    Neutralization reaction HCL(aq) + NaOH(aq) -> NaCl(s) + H2O(l) Use your results to determine the netball change of the neutralization reaction, in kJ/mol of NaOH, Write the thermochemical equation for the neutralization reaction. I'm not sure how to even go about doing this...
  58. chemistry

    calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant concentration to decrease to 0.00269 M
  59. chemistry

    calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant concentration to decrease to 0.00269 M
  60. Chemistry 101

    Write the reaction that occurs when sodium phosphate and barium chloride react. Be sure to include the phase labels. Then write the total ionic reaction and the net ionic reaction including proper phase labels.
  61. Chemistry

    For a particular reaction, ΔH° is 20.1 kJ/mol and ΔS° is 45.9 J/(mol·K). Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction? The reaction is spontaneous for temperatures is ...
  62. Chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 807.0 kg of PbS and 1210 kg of PbO
  63. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 553.0 kg of PbS and 830 kg of PbO.
  64. Chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 220.0 kg of PbS and 330 kg of PbO.
  65. Chemistry

    HELP!!! At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 487.0 kg of PbS and 750 kg of PbO.
  66. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 593.0 kg of PbS and 890 kg of PbO.
  67. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 887.0 kg of PbS and 1330 kg of PbO.
  68. chemistry

    At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 887.0 kg of PbS and 1330 kg of PbO.
  69. Chen=mistry

    Sodium metal reacts violently with water to form NaOH and release hydrogen gas. Suppose that 3.00 g of Na reacts completely with 3.00 L of water and the final volume of the system is 3 L. What is the molarity M of the NaOH Solution formed by the reaction?
  70. Chemistry

    For the following reaction, 9.91 grams of sulfur are allowed to react with 20.8 grams of carbon monoxide . sulfur(s) + carbon monoxide(g) sulfur dioxide(g) + carbon(s) is the maximum amount of sulfur dioxide that can be formed? What is the FORMULA for the limiting reagent? ...
  71. carbon+sugar=starch

    Why are you saying that carbon is needed to make starch? Actually only sugar (glucose) is needed along with an enzyme to catalyze the linkage of multiple glucose units in a dehydration (loss of water) reaction. Glucose + Glucose ----> maltose + H2O maltose is disaccharide. ...
  72. Biology question pH

    pH levels are each a 10-fold change so a change by 2 is actually a change by 1000. pH determines certain characteristics in organisms that allow them to live in certain areas so an alteration in pH changes their adaption skills. why is a change by 2 = 1000? what would a change...
  73. ap chem

    A certain volume of a .50 M solution contains 4.5g of a certain salt. What mass of the salt is present in the same volume of a 2.5 M solution? Indicate the concentration of each ion/molecule: A mixture of 50.0 mL of .2M KClO3 and 25.0 mL of a .20M Na2SO4. How would you answer ...
  74. Chemistry

    1) Balance this redox reaction using the oxidation-number method. Zn + O2 + HCl ® ZnCl2 + H2O 2) Balance this redox reaction using the half-reaction method. (basic solution) Zn + MnO4- ® Zn(OH)2 + MnO2
  75. Chemistry

    What is the difference between a forward and a reverse reaction? I am studying Lechatelier's principal and it states that with an increase in temperature it favors a reverse reaction and when the temperature decreases it favors a forward reaction. What does this mean exactly?
  76. chemistry

    The reaction of zinc and chlorine requires 0.00624 mol of Zn and 0.0125 mol of Cl to react exactly to form zinc chloride. What is the mole ratio of Zn to Cl? What is the empirical formula of zinc chloride?
  77. Chem II

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

    Could you explain in detail why a saponification reaction is considered to be the reverse of an esterification reaction.
  79. gr 12 chemistry

    write an equation for a reaction involving an aldehyde to illustrate a hydrogenation reaction.
  80. 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
  81. chemistry

    balanced reaction for reaction between ferrous sulphate and nittric acid
  82. Chem

    Why do the rate of reaction for a reversible reaction slows down at equilibrium stage.
  83. chemistry

    Given the reaction 1/2 N2( g) + 3/2 H2 (g) ___> NH3 (g) +11.0kcal.Is this reaction exothermic or endothermic?
  84. 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?
  85. Chemistry

    Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you
  86. Chemistry

    Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you
  87. CHEMISTRY

    In electrolysis , which reaction does occur on the cathode , half oxidation reaction or reduction ?
  88. 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?
  89. Chemistry

    Pentane gas (C5H12) combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it conform to reality.
  90. Chemistry

    1. Pentane gas (C5H12) combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it conform to reality
  91. AP CHEMISTRY

    The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR <-> Acid form <-> Base Form <-> pH Transition Interval...
  92. AP CHEMISTRY

    The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR <-> Acid form <-> Base Form <-> pH Transition Interval...
  93. chemistry

    what is the difference between acid base reaction and oxidation reaction
  94. Chemistry

    How does the activation energy of an uncatalyzed reaction compare with that of the catalyzed reaction?
  95. Organic Chem

    What is the generic reaction equation for the Maillard reaction? Please help ^_^
  96. chemistry

    for an exotherimic reaction incresing the reaction temperature results in a (n)___k ?
  97. Chemistry

    What chemical compound is formed in the reaction when 6M HCl and 1M NaOH is reaction?
  98. Chemistry

    What is the reaction between mno4- and c2o42- and is there a colour change in this reaction?
  99. Chemistry

    Show that the reaction caco3 ->cao+co2 is not a redox reaction
  100. Chemistry

    Show that the reaction caco3 ->cao+co2 is not a redox reaction
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