1. chemistry

    Could you please tell me the objective, theory and mechanism,result, precautions and applications of following experiment : reaction of 4-aminotoluene and o-vanillin(preparation of azomethine)
  2. chemistry

    what is a titration, what is the type of reaction to find the volume of hydrochloric acid needed to react with 25 of potassium hydroxide solution
  3. chemistry

    write a balanced chemical equation for the process of photosynthesis and the conditions of the reaction giving physical state of all the substances
  4. chemistry

    give the full, ionic and net equations for the reaction (if any) that occurs when aqueous soulutions of Na2CO3 and MgCl2 are mixed.
  5. Living a Healthy Life

    A child's ability to jump for distance is an example of A. flexibility. B. explosive power. C. reaction time. D. agility. B.
  6. chemistry

    If 150.0 f of sulfuric acid is spilled, what is the minimum number of moles of sodium carbonate have to be added to complete reaction
  7. chem

    Given: 3H2(g) + N2(g) 2NH3(g) If the reaction starts with 0.500 mol of H2, how many atoms of hydrogen in the compound NH3 would you expect to make?
  8. Chemistry

    Consider the following equilibrium at 395K: NH4HS(s) <--> NH3(g) + H2S(g) The partial pressure of each gas is 0.265 atm. Calculate Kc for the reaction
  9. Chemistry

    In a coffee cup calorimeter, 50.00 mL of HNO3 (aq) and 50.00 mL of KOH(aq) were mixed. The temperature of the resultant solution increased 6.5 C. What is the Delta H of this reaction?
  10. Chemistry

    Sulfur dioxide gas is bubbled through sodium hydroxide solution Write the balanced formula equation for this reaction
  11. Chemistry

    Write a balanced equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, CaS.
  12. organic chwmistry

    When bromobenzene reacts with propene in a Heck reaction, two constitutional isomers are obtained as a product. Give the structures of the two
  13. 11th grade physics

    if action and reaction are always equal and opposite, why don't they always cancel each other and leave no force for acceleration of the body?
  14. Chemistry

    For the following reaction, how many kJ of heat are produceed in forming 225.0 g of NO? 4 NH3 + 5 O2 → 4 NO + 6 H2O ΔHrxn = -906 kJ/mole
  15. Chemistry

    For the following chemical reaction HCN(aq)+KOH(aq)--->H2O(l)+KCN(aq) Write the net ionic equation, including the phases.
  16. Chemistry

    NaOH+HNO3---> NaNO3+H2O calculate the number of moles of every ion present in solution after the reaction has occurred.
  17. chemistry

    How many grams of Nitric oxide are required to produce 145g of nitrogen in this reaction: Al2O3(s)+6NO(g)---->5N2(g)+6H2o(l)
  18. Chemistry

    Write a balanced chemical equation that represents the reaction between methane and hydrochloric acid. CH4+HCl-> I'm not quite sure what happens...help please? Thanks in advance!
  19. Chemistry

    For a certain reaction, the activation energy is 52.1 kJ/mole. By what ratio will the rate constant change if the temperature is decreased from 175C to 75C?
  20. CHEMISTRY!!

    1) How would you prepare 20 mL of a solution having pH = 2.00 by dilution of 0.10 M HCl? 2) The Ka, for hypochlorous acid, HClO, is 7.2 x l0^–4 at 25°C. What is pKa? Write the equation for the reaction to which Ka applies.
  21. Chemistry

    A student observed the following reaction: AlCl3(aq)+3NaOH(aq) -> Al(OH)3(s)+3NaCl(aq) After the products were filtered, which substances remained on the filter paper and why?
  22. chemistry

    Complete, Balance and classify the chemical reaction....please help do not understand A)Li(s)+AuCL3(aq)-> B)AL(NO3)(aq)+K2CO3(ag)-> C)Ba(s)+F2(g)-> D)SnCI2(aq)+Na3PO4(aq)-> E)Na+AICI3(s)->
  23. Organic Chemistry

    The E1 elimination reaction proceeds through a _________ . A. concerted process B. carbocation intermediate C. polarized transition state
  24. chemistry

    my ques is 2Fe2S3+3O2+6H2O-4Fe(OH)3+6S THIS REACTION WRIGHT ,WRONG PLZ JUST REPLY I AM WAIT FOR YOUR ANSWER.
  25. stoichiometry

    How many grams of Nitric oxide are required to produce 145g of nitrogen in this reaction: Al2O3(s)+6NO(g)---->5N2(g)+6H2o(l)
  26. chemistry

    Whatis the chemical name of the substance formed in the slow reaction that takes place when iron filings are mixed with water?
  27. Chemistry

    How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? 4HCl + O2 --> 2H2O + 2Cl
  28. chemistry

    Given: 3H2(g) + N2(g) 2NH3(g) If the reaction starts with 0.500 mol of H2, how many atoms of hydrogen in the compound NH3 would you expect to make?
  29. CHEMISTRY

    BALANCE THE REDOX REACTION USING HALF CELL METHOD IN AN ACIDIC MEDIUM CHCl3 + MnO4- = Cl2 + CO2 + Mn+2
  30. chemistry

    Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. 2D(g)+3E(g)+F(g)>>>>2G(g) + H(g) when D is decreasing at 0.30 MOL/Ls, how fast is (H) increasing?
  31. chemistry

    What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
  32. CHEMISTRY

    Given: 3H2(g) + N2(g) 2NH3(g) If the reaction starts with 0.500 mol of H2, how many atoms of hydrogen in the compound NH3 would you expect to make?
  33. Chemistry

    How many moles of NaBH4 are needed to generate one mole of B2H6 if the reaction gives an 80% yield? 3NaBH4 +4BF3 ¨ 3NaBF4 + 2B2H6
  34. chemistry

    What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
  35. Chemistry

    1)In the reaction O2+2F2--> 2 OF2, F2 is the oxidizer. 2)F can't have positive oxidation states. Does 2 explains the reason for the 1st one or is it because because of F's higher electronegativity?
  36. chemistry

    Al2O3(s)+6NO(g)---->5N2(g)+6H2O(l) how many grams of Nitric Oxide are required to produce 145g of nitrogen in the following reaction?
  37. chemistry-electrochem

    Determine the equilibrium constant, Keq, for the reaction 5.3 10–19 18.30 1.7 1054 1.9 1018 5.7 10–55 this is an assignment question- as writen, no values, nothing. any help
  38. Chemistry

    Consider this reaction N2g+O2g+2NOg H=180.5kj How much heat would be required to produce 1.300 mol NOg?
  39. Chemistry

    The first order reaction has a rate constant of 3.0x10^-3 s^-1. The time required for the r eaction to be 75% complete is: 95.8s 201s 231s 462s 41.7s
  40. chemistry

    What is the molarity of ZnCl2 that forms when 19.0 g of zinc completely reacts with CuCl2 according to the following reaction? (Assume a final volume of 195 .)
  41. Chemistry

    The equilibrium constant for the reaction: 2NO(g)+Br2(g)<==>2NOBr(g) Kc=1.3x10^-2 at 1000 Kelvin Calculate Kc for: NOBr(g)<==>NO(g)+ 1/2Br2(g)
  42. PIMACOMMUNITY COLLEG

    WRITE THE NET IONIC EQUATION INCLUDING the phases for the reaction of the Hclo2+Naoh--------->H2o+Naclo2
  43. chemistry

    if the activation energy for a given compound is found to be 10 kJ/mol, with a frequency factor of 4.0x10^13 s-1, what is the rate constant for this reaction at 398K?
  44. Chemistry

    Using the Table of Thermodynamic Data calculate Kp at 500 K for the reaction 2 HI(g)-->I2(g) + H2(g) , if Kp at 300 K is 2.16x10-3 , assuming that delta H˚ is constant.
  45. Chemistry

    In H2SO4 + 2NaOH = 2H2O + Na2SO4 How much of the excess reagent will remain after the reaction has been completed? I know that NaOH is the limiting reactant
  46. chemistry

    How many grams of hydrogen are released by the reaction of 1.00 g of aluminum with excess potassium hydroxide solution assuming 100% yield
  47. Gen Chemistry

    What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)|Al3+(aq)||Ni2+(aq)|Ni(s)
  48. adult education

    summarizes the processes of blood clotting, immune response, allergic reaction, and hormone release and how are they interrelated
  49. Chemistry

    When you mix sodium bicarbonate and calcium chloride with bromothymol (and indicator that changes color when a chemical reaction occures) what does it create?
  50. Chemistry

    Consider the following equilibrium at 395K: NH4HS(s)<-> NH3(g) + H2S(g) The partial pressure of each gas is 0.265 atm. Calculate Kc for the reaction.
  51. azad university

    solving advance reactor ideal gas with the this reaction : 4ph3 ->p4+6h2 (xa=0.5 , T=400k) , P=20 atm) how much volume we need until Xa=0.5 ?
  52. chem

    For the reaction 2Cl2(g)+4NaOH(aq)->3NaCl(aq)+ NaClO2(aq)+2H2O(l) how many grams of NaCl can be produced from 30.8 g of Cl2 and excess NaOH?
  53. Chemistry

    Consider the reaction 2D2(g)+O2(g)→2D2O(l) What is the mass of heavy water, D2O(l), produced when 3.75g of O2(g) reacts with excess D2(g)?
  54. Chemistry

    Zinc reacts with hydrochloric acid according to the reaction equation... Zn (s) + 2HCl (aq) ---> ZnCl2 (aq) + H2 (g) How many milliliters of 5.00 M HCl (aq) are required to react with 5.55 g of Zn (s)??
  55. Chemistry

    For the following chemical reaction... HCN (aq) + KOH (aq)----> H2O (l) + KCN (aq) write the net ionic equation, including the phases
  56. chemistry

    Given the following data: 4PCl5(s) ¨ P4(s) + 10Cl2(g) ƒ¢H = +1774 kJ P4(s) + 6Cl2(g) ¨ 4PCl3(l) ƒ¢H = -1278.8 kJ Find the ƒ¢H of the following reaction: PCl5(s) ¨ PCl3(l) + Cl2(g)
  57. chemistry

    why would acyl halides give higher yields of amides compared to carboxylic acids or esters on reaction with NH3?
  58. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.875 M and [Ni2 ] = 0.0100 M. I keep on getting the answer .42 which is incorrect. Thank you so much in advance!
  59. Chemistry

    The rate constant fo a particular reaction increases by a factor of 6.5 when the temperature is increased from 300.0K to 310.0K. Calculate the activation energy.
  60. Chemistry

    what mass of water will be formed by reaction of 3.50g of methylamine (8CH3NH2) with 15.0g of perchloric acid (13HClO4)? Answer is 99.1. How do you work this?
  61. chemistry

    One of the by-products of a reaction is 2-methyl-2-butene. A) Suggest a mechanistic pathway for the formation of this alkene. B) How is this by-product removed during the purification?
  62. Medical language

    Summarize the processes of blood clotting, immune response, allergic reaction, and hormone release and how are they interrelated.
  63. Chemistry

    Balance? Cr2O7^2- + C2H4O yields C2H4O2 + Cr^3+ (When I say ^ a number followed by a plus or minus that's the charge) Half-reaction method needed.
  64. Chemistry

    Write a net ionic equation for the reaction that occurs when cobalt(II) carbonate (s) and excess hydroiodic acid are combined.
  65. Chem 151 - help

    Write the balanced equation for the neutralization reaction between H2SO4 and KOH in aqueous solution. Phases are optional.
  66. Inorganic chemistry

    write a balanced half-reaction for the reduction of permanganate ion, Mn04, to Mn02 in a basic solution
  67. Chem

    Question 11 Marks: 4 Consider the equilibrium of water with gaseous hydrogen and oxygen: Give the value of for this reaction, if it is written as: Choose one answer. a. -7.8 x 10^-16 b. -3.9 x 10^-16 c. 1.3 x 10^-15 d. 6.4 x 10^-14 e. 3.6 x 10^2
  68. chemistry

    Choose the term that best describes the following chemical reaction: C10H8 + 12 O2 10 CO2 + 4 H2O A. synthesis B. combustion C. electrolytic D. decomposition
  69. 11th grade

    If the volume of water produced during the reaction doubled, what would happen to the ratio of hydrogen to oxygen in the following equation: 2 H2+ O2 --> 2 H2O
  70. Chemistry- please help!!

    The following reaction occurs in an aqueous acid solution: no3- + I- -> IO3- + NO2 In the balanced equation, the coefficient of water is A. 4 B. 3 C. 1 D. 5 E. 2
  71. Science(chemistry)

    Give one word/term for the following descriptions during this type of reaction,the appearance,colour or shape of a substance is changed
  72. organic chemistry

    Show the reaction equation and mechanisms of a mixture of napthalene,p-nitroaniline and benzoic acid dissolved in dichloromethane?
  73. organic chemistry

    Show the reaction equation and mechanisms of a mixture of napthalene,p-nitroaniline and benzoic acid dissolved in dichloromethane?
  74. chemistry

    the thermal decompostion of 26.4g of CaCo3 produced10.6g calcium and 3.17g carbon. calculate the mass of oxygen produced in this reaction.
  75. physical science

    What formula can be used to find the surface area on the rate of reaction, when adding rennies or cal-C-vitas to vinegar?
  76. Chemistry

    Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.
  77. chemistry

    What is the activation energy for a reaction whose rate is tripled by a temperature increase from 28 to 53 C? I understand that I have to use the arrhenius equation, but how do I set it up for a problem like this?
  78. chemistry

    Determine the actual values for the standard change in entropy for the following reaction. NH3(g) + HCl(g) NH4Cl(s) do I use the delta G equation?
  79. Organic Chemistry 1

    Write an equation for the reaction of sodium bicarbonate with aqueous sulfuric acid to produce carbon dioxide.
  80. Science (urgent)

    Hi I really need to know this I've asked a couple times but haven't gotten an answer yet. In the reaction X + Y ® Z, Z is the A) substrate. B) product. C) enzyme. D) carbon molecule.
  81. Chemistry

    Write a net ionic equation for the reaction that occurs when excess hydrobromic acid (aq) and sodium sulfide are combined.
  82. Chemistry

    If the activation energy for a given compound is found to be 42.0 kJ/mol, with a frequency factor of 8.0 × 1010 s-1, what is the rate constant for this reaction at 298 K?
  83. Chemistry II

    At a certain temperature, Kc = 33 for the reaction: H2(g) + I2(g) 2HI(g) Assume that the initial concentrations of both H2 and I2 are 6.00 x 10-3 mol/L. Find the concentration of each reactant and product at equilibrium.
  84. Physical science

    Calculate the mass of carbon monoxide that was needed to produce 78 grams of methanol by the following reaction: 2H2+CO=CH3OH
  85. science

    identify the type of reaction when hydrogen sulphide gas burns in oxygen to give water and sulphur dioxide
  86. gen chem

    what would Qc be if the pressure of the container decreased by a factor of 2.417 for the following reaction? 4Hcl(g)+O2(g)<-->2Cl2(g)+2H2O(g) Kc=13.298 @ 753K
  87. Chemistry

    Write the net ionic equation for the reaction between sulfuric acid and potassium hydroxide. I got 2H^+ + 2OH^-1 ==> 2H2O. Is this correct?? Thanks.
  88. chemistry

    consider the following reaction: 2C2H6(g)+7O2 (g)-->4CO2(g)+6H2O (g) delta H = -3120kJ If 3.00g of ethane are burned, how many kJ of heat are produced?
  89. Chemistry

    A reaction at 2.43 atm produces 20.0 L of a gas and evolves 75.3 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ).
  90. chemistry

    Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume 4.00L
  91. chemistry

    Read the scenario. Hydrogen chloride (HCl) and potassium hydroxide (NaOH) react. What products are formed from this reaction?
  92. chemistry

    Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume 4.00L
  93. chem

    What volume of benzene (C6H6,d=0.88g/ml,molar mass=78.11g/mol) is required to produce 1.5 x 10^3 kJ of heat according to the following reaction?
  94. cHEMISTRY

    What mass of AgCl(143.32g/mol) is formed from the reaction of a 0.109 M MgCl2 solution with excess AgC2H3O2?
  95. english

    the author of my brothers keeper mainly develops jamies character through A. his actions b.dialogue and thoughts c.the narrators description d.others reaction to him
  96. Language of Health Care

    How are the processes of blood clotting, immune response, allergic reaction, and hormone release interrelated?
  97. Chemistry

    In the reaction Ca(OH)2 + 2HCL -> CaCl2 + 2H2O: How many kilograms of H2O will be produced when 0.0948 Kg of Ca(OH)2 react with excess hydrochloric acid?
  98. Chemistry

    . For the reaction 2H2(g) + 2NO(g) → N2(g) + 2H2O(g) The observed rate law is Rate =k[NO]2[H2] The mechanisms shown below have been proposed to explain the kinetics of the above reaction Which of the following are acceptable mechanisms? Explain you
  99. Chemistry

    A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP....? A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP, with 0.163 M NaOH solution. She recorded an initial buret reading of 0.84 mL and
  100. Chemistry again

    Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has Au foil in 1.00M Au(NO3)3, and the other half-cell has a Cr bar in 1.00M Cr(NO3)3. In the second cell, one half-cell has a Co