1. chemistry

    an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product of this reaction?
  2. chemistry

    an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product of this reaction?
  3. Chemistry

    Determine the mass of phosphoric acid that can be produced by the reaction of 1 ton of phosphate rock, Ca(PO4)2, and sulfuric acid.
  4. Chemistry

    Considering the following precip reaction Pb(NO3)2(aq)+2KI(aq)----->PbI2(s)+2KNO3(aq) What is the correct net ionic equation? I think it is 2NO3+^-+2K^+---->2KNO3
  5. Chemistry

    Which of the following does NOT take place in a chemical reaction? a-new substances are formed b-neutrons are released c-energy is released or absorbed d-reactants disappear
  6. chemistry

    an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product of this reaction?
  7. chemistry

    The reaction equation below shows the formation of aluminum oxide. Which set of coefficients balances the equation? Al + O2 ?Al2O3 A. 1,1,1 B. 2,3,5 C. 2,4,5 D. 4,3,2 . can someone help me pleaseee!!
  8. Chemistry II

    The value of ^G for the following reaction is -5490 kJ. Use this value and data to calculate the standard free energy of formation for C4H10 (g). 2 C4H10 (g) + 13 O2 (g) --> 8 CO2 (g) + 10 H2o (l)
  9. chemistry

    How can i be accurate when assigning oxidation numbers? By this i refer to elements that have more than 1 oxidation # . For example: I have been working with hydrides and i had this reaction in mind: Nb + H Shoud i use 3 or 5 for Nb, why?
  10. organic chemistry

    An ether and an alkene are formed as by-products in this reaction. Draw the structure of these by-products and give mechanism for their formation.
  11. Chemistry

    Enter the net ionic equation, including phases, for the reaction og AgNO3 (aq) with Ba(OH)2 (aq). I have Ag+ +OH- =AgOH but I don't know how to determine the phases.
  12. chemistry

    when water is combined with magnesium nitride to produce magnesium hydroxide and ammonia gas, is this reaction endothermic or exothermic and why?
  13. chemistry

    Over an interval of 1second (s) the mass of Mg(s), in the reaction below, changes by -0.011g. What is the corresponding rate of consumption of HCl(aq) in mol/second (mol/s). Mg(s) + 2HCl -> MgCl2(aq) +H2(g)
  14. Chemistry

    Given the same reaction as before: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 Great! 3.21 moles of O2 were produced. Now, How many molecules of O2 does this number of moles represent?
  15. Chemistry II

    The value of ^G for the following reaction is -5490 kJ. Use this value and data to calculate the standard free energy of formation for C4H10 (g). 2 C4H10 (g) + 13 O2 (g) --> 8 CO2 (g) + 10 H2o (l)
  16. Chemistry for Engineers

    How many mL of .2475M Sr(OH)_2 solution are needed to neutralize 25 mL of 0.1542M HCL solution in the reaction 2HCl + Sr(OH)_2 -> SrCl_2 + 2H_2_O
  17. science chemistry

    Given 4K + O2 → 2K2O, what is the reaction type? Single Replacement Double Replacement Synthesis (formation) Decomposition
  18. Chemistry

    For an enthalpy lab, why would calculated value differ from the theoretical value (in percent error) for the heat reaction of Mg/HCl and MgO/HCl
  19. Chemistry

    determine the mass of sodium chloride produced when chlorine reacts with 0.29 g of sodium iodine in a single replacement reaction
  20. chemistry

    2NO2(g) <-----> N2O4(g) If 0.625mol of dinitrogen tetraoxide in 5.0L is allowed to come to equilibrium and at equilibrium has a concentration of 0.0750M, Calculate K for this reaction. Does K= 7.5?
  21. chemistry

    Calculate the molarity if a Ba(OH)2 solution if a 37.25ml portion of this solution is neutralized by 45.00mL of 1.500M HCl. You will need the balanced reaction
  22. chemistry

    determine the mass of phosphoric acid that can be produced by the reaction of one thousand tons of phosphate rock and sulfuric acid
  23. Chemistry

    What type of chemical reaction is involved in the breakdown of large molecules, such as those found in food,into smaller molecules? i think it might be Catabolism, but im not sure
  24. CHEMISTRY

    how many grams of copper (II) Chloride are formed in the double replascement reaction of 1.1 g copper (II) oxide and excess hydrochloric acid?
  25. chem

    Suppose that a reaction calls for 1.25 moles of ethanol,C2H6O (mw= 46.07 g/mol d=0.7893g/cm^3. what volume of ethanol shold one measure out
  26. chemistry urgent

    if 100 g of iron were reacted with 100 g of oxygen according to the reaction below, the maximum yield in grams of Fe2O3 would be: Dr. Bob. Please help.
  27. chem 1046

    calculate the equilibrium constants at 25°C for each reaction. ΔGf° for BrCl(g) is −1.0 kJ/mol Br2(g) + Cl2(g) 2 BrCl(g)
  28. AP CHEM (URGENT)!!!!!

    How can ionization potential and electron affinity be used to predict whether or not a simple synthesis reaction will occur between a metal and a non-metal.
  29. character education

    When friends intentionally do a small wrong to you, your best reaction should be to _________________________. quit being their friend forgive and encourage them in doing right tell them what they did was wrong C
  30. Chemistry

    Determine the mass of phosphoric acid that can be produced by the reaction of 1 ton of phosphate rock, Ca(PO4)2, and sulfuric acid.
  31. bio lab

    Why photosynthesis does not occur in calibration tube which has water and chloroplast? Why we used deveined spinach leaves in photosynthesis reaction
  32. Chemistry

    Determine the mass of phosphoric acid that can be produced by the reaction of 1 ton of phosphate rock, Ca(PO4)2, and sulfuric acid.
  33. Chemistry

    A solution of X2CO3 has a concentration of 15.2 g/dm^3. 25 cm^3 of this solution require 27.5 cm^3 of 0.2 M HCl for complete reaction. Calculate the ralative atomic mass of X
  34. Chem Help!

    Describe how you would prepare t-butyl-n-butyl ether. assume you are working on a 1 M scale. what reagents would you use? What solvent? what reaction conditions?
  35. Chemistry

    For the reaction 2Na (s) + Cl2 (g) --> 2NaCl (s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl2 (at STP)? What is the limiting reactant?
  36. Chemistry

    Which one of the following combinations of reagents will result in a spontaneous reaction? A) Al(s) + CuCl2(aq) B) Al(s) + CaCl2(aq) C) Zn(s) + CaCl2(aq) D) Cu(s) + ZnCl2(aq) I know the answer is A, but what I don't know is why, or how to figure this out.
  37. Chemistry

    Calculate the heat change (q) in kJ for each reaction. Assume the density of the acid solutions is 1.00 g/mL and the heat capacity is 4.184 J/g*°C. i have the Ti and Tf..what equation do i use?
  38. Chemistry

    For the reaction Ag2S(s) ⇌ 2 Ag+ (aq) + S2- (aq), what happens to the equilibrium position if ammonium sulfate is added? A) doubles B) shifts to the left C) does nothing D) shifts to the right E) halves
  39. chem

    How do I calculate the rate of a reaction of a substance using the slope of the lines and stoichiometry of the reactions in moles/sec. I also know that the molarity of that substance.
  40. Chemistry

    For the reaction: H2(g) + Cl2(g) ¨ HCl(g) (is this balanced?) calculate the mass, in grams of H2 needed to react with 25.0g Cl2. A. none of these B. 25.0 C. 0.711 D. 0.353
  41. chemistry

    If the intial rate of the reaction produces 2 moles of water vapor, H2O, per second, what is the rate at which oxygen, O2, is consumed initially?
  42. chem

    Consider the unbalanced reaction CO + H2O > CH4 + O2. All reactants in the gas phase. Calculate H per mole of H2O reacted. (The > is an arrow)
  43. CHEM! (SCIENCE) NEED HELP

    According to the reaction below,if 24 moles CO2 were produced,how many moles of C2H6 were reacted? 2C2H6+7O2 -> 4CO2+6H2O
  44. chemistry

    I need to write a balanced equation and indicate the type of reaction phosphoric acid + magnesium hydroxide= magnesium phosphate+ water
  45. Chemistry

    Question 6: From the following data, calculate ΔH° for the reaction O3(g) +NO(g)----->O2(g)+NO2 (g) Compound ΔH°f (kJ/mol) O3 142.7 NO 90.3 O2 0 NO2 33.2 (If that was jumbled up i Dont understand?
  46. Chemistry

    Determine the actual yield in grams of CCL4 if 175.0g of Cl2 reacts with meathane. The percentage yield of the reaction is 75.4%
  47. chemistry

    Given: Cr3+(aq) + 3e¨C  Cr(s); E¡ã = ¨C0.74 V Pb2+(aq) + 2e¨C  Pb(s); E¡ã = ¨C0.13 V What is the standard cell potential for the following reaction? 2Cr(s) + 3Pb2+(aq) ¡ú 3Pb(s) + 2Cr3+(aq)
  48. Chemistry

    Give the molecular, complete ionic, and net ionic equations for the reaction of sulfuric acid and barium hydroxide.
  49. chemistry

    if you have a reaction with an acid dissociation, where one HA goes to H + A how can the entropy be negative? I thought that one mole going to two moles would have positive entropy because of the greater disorder.
  50. chemistry

    H2 (g) is made when 8.5 grams of Li is placed in water. The reaction also creates Lithium Hydroxide. Li + H2O --> LiOH + H2 How much H2 (g) is made? (the (g) means gas!)
  51. Chemistry

    HCO2H(g) ¨ CO2(g) + H2(g) The half-life for the reaction at 550 ‹C is 24 seconds. How many seconds does it take for the formic acid concentration to decrease by 75%?
  52. chemistry

    How many grams of sodium were isolated from the decomposition of 0.0292 moles of Na2O, if the reaction occurred with a 44.9% percent yeild? 2 Na2O(s) --> 4 Na(s) + O2(g)
  53. chem

    1.70 L of 0.550 M H2O2 reacts according to the following reaction. 2H2O2(aq) -> 2H2O(l) + O2(g) How much H2O is formed? (molar mass of H = 1.00 g/mol O = 16.0 g/mol)
  54. chemistry

    2 Al + 3 S --> Al2S3 In an experiment 10.0 g Al is combined with 15.0 g S. If the reaction continues until one reactant is totally consumed, which reactant would be in excess and how many grams would be unreacted?
  55. Chemistry

    Write the equation for the reaction of calcium and oxygen. Write the oxidation numbers for both the reactants and the products. What is the reducing agent and why?
  56. chemistry

    How many grams of kmn04 are contained in 35ml of 0.05N kmn04 used in the following reaction in basic solution. the answer 0.0922g who helps
  57. Chemistry

    what volume of oxygen is needed to react with solid sulfur to form 6.20 L of sulfur dioxide according to the reaction S(s) + O2(g) yield SO2(g)
  58. Chemistry

    50.0mL of 1.04moles HA is added to 50.0mL if 0.90moles NH4OH.With a 1:1 stoichiometric ratio. What is the limiting reactant in moles of this reaction.
  59. Chemistry

    N2 + 3H2 =2NH3 How many molecules of H2 are represented in the reaction? How many nitrogen atoms are represented in the reactants? How many moles of NH3 are formed?
  60. chemistry

    How much energy is evolved during the formation of 98.7 g of Fe, according to the reaction below? Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s) ΔH°rxn = -852 kJ A. 482 kJ B. 753 kJ C. 1.51 × 10ee3 kJ D. 4.20 × 10ee3 kJ
  61. Chemistry Lab

    You want to determine the heat generated in a gas-producing reaction. Is this possible? If so, describe the design of such a calorimeter. If not, describe why this cannot be done. Your help is much appreciated!
  62. chemistry

    The rate constant of a reaction is 6.2 x 10^-3s-1 at 25 degrees C, and the activation energy is 33.6 KJ/mol.. What is k at 75 degrees C? Enter your answer in scientific notation.
  63. 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?
  64. Chem

    What is the conversion of the sodium salicylate to salicylic acid reaction? C6H4(OH)(COONa) + 1/2 H2SO4 -> C6H4(OH)(COOH) + 1/2 Na2SO4
  65. chemistry

    Consider the following mechanism. Step1: A+B<---->c (equilibrium) Step 2: C+A---->d (slow). Overall: 2A+B---->D. Determine the rate law for the overall reaction (where the overall rate constant is represented as k).
  66. chemistry

    Hello ellie again. I am still having trouble understanding bombardment. The question I'm working on says Complete the bombardment reaction ? + 40-18Ar → 43-19K + 1-1H
  67. Chemistry

    How many grams of water will be produced if 32.0 g of nitrous oxide are also produced in the reaction? useing this equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
  68. Chemistry, HELP!!

    Write out a balanced equation for reaction of solid zinc with hydrochloric acid (HCl(aq)). Indicate all states of matter in your equation.
  69. Chemistry

    How many moles of dichloromethane (CH2Cl​2) would be produced if we doubled the amount of chlorine, but still had the same amount of ethene (C2H4) available in the reaction?
  70. chemistry

    0.443g of silver metal was obtained wen 0.784g of silver nitrate decomposes. What is the percentage yield of the reaction
  71. BioChem

    Write the chemical equation for the reaction that occurs when you add NaOH solution to NaH2PO4/Na2HPO4 buffer solution
  72. Chemistry

    Determine Kc for the following reaction: 1/2N2(g) + 1/2O2(g)+ 1/2Br(g) <-> NOBr(g) from the following information (at 298K) 2No(g) <-> N2(g) + O2(g) Kc = 2.1x10^30 NO(g) + 1/2Br2(g) <-> NOBr(g) Kc = 1.4
  73. Chemistry

    How do I balance this redox reaction? MnO4- + Fe2+ + H+ + Mn2+ + Fe3+ + H2O I don't understand. Don't I need a product?
  74. chemistry

    What is the balanced molecular,total ionic, and net ionic equations illustrating the reaction of magnesium hydroxide and HCl
  75. chemistry

    In a titration, 4.1 g of an acid (HX) requires 32.8 mL of 0.74 M NaOH(aq) for complete reaction. What is the molar mass of the acid? Answer in units of g/mol.
  76. CHE 107

    Any help is greatly appreciated! If aspirin reaction is carried out with a 95% yield, how much salicylic acid is needed to produce 90.0 g of aspirin?
  77. science

    How many grams of CO are needed to react with an excess of Fe2O3 to produce 558 g Fe? The equation for the reaction is: Fe2O3(s) + 2 CO(g) → 3 CO2(g) + 2 Fe(s)
  78. 9th grade

    10 gm of silver nitrate solution is added to 10 gm of sodium chloride solution what change in mass do you expect after the reaction and why?
  79. Chemistry

    Write an equation for the oxidation of NH2OH to HNO3 by KBrO3. Balance the reaction equation using the ion-electron method.
  80. 9th grade

    10 gm of silver nitrate solution is added to 10 gm of sodium chloride solution what change in mass do you expect after the reaction and why?
  81. Chemistry

    Fe2O3(s) + 2Al(s)-> 2Fe(l) + Al2O3(s) What is the theoretical yield of iron if we begin the reaction with 10.5 g of Al (assume an excess of Fe2O3)
  82. chemistry

    Calculate the number of hydrogen molecules formed when 5.6 mL of ammonia at STP is decomposed by the following reaction: ___NH3 „³ ___ N2 + ___ H2
  83. Chemistry

    Time, (min): 0 10 20 30 Moles,(trans): 1.00 0.90 0.81 0.73 Given the following data, what is the order of the reaction? How long will it take for the half of the trans compound to decompose?
  84. Translation

    I am in a translation class and the sentence contains this phrase can you tell me what it means The city was brutal in its reaction wiping 50 3/4p off the share price what does 50 3/4p stand for
  85. Chem-BufferQ

    You have a solution of .5 L of 1.74g of NH3 and 4.15g of (NH4)2SO4. How many ml of 14M HCl is required for a pH of 9.00? I don't know how to go finish this one. I thought about figuring the concentrations of each (NH3, NH4), making an ice table and solving
  86. Chemistry

    I really need help with this; it'll be the last chemistry question I ask: 44. Identify the type of reaction. a. AB ---> A+B b. AB + C--> AC + B c. AB + CD --> AD + CB Thanks -MC
  87. chemistry

    the reaction between CV+ and -OH, is CV+ lewis acid and OH lewis base
  88. chemistry

    the reaction between CV+ and -OH, is CV+ lewis acid and OH lewis base
  89. scince thanks

    is a chemical reaction and chemical change the same if not what is the difference?
  90. chem

    if the delta h for the reaction A + 2B -> C is 150 kj, delta h for 6A + 12B -> 6C is what?
  91. Chemistry

    The Ksp value for FeS is 6 x 10^-18 M. FeS(s) --> Fe^(2+)(aq) + S^(2-)(aq) What is DG at 25 degrees C for the reaction?
  92. chemistry

    Calculate how much Hg in a reaction that produces 87.4 g O2 using: 2HgO produces 2 Hg + O2
  93. Science

    When would you want to have a corrosive reaction? I can find when you wouldn't want to have one but not when you wouldn't. Please help!! Thank you
  94. Chemistry

    What is the reducing agent in the following reaction? 2K + S - - > K2S K S*** K2S None of the above
  95. chemistry

    if 500 g of mgcl2 are produced in the above reaction how many l of h2 are produced
  96. Chemistry

    If you produce 3.5 moles of H2, how many moles of aluminum did you use in the reaction?
  97. Chemistry

    What is the reducing agent in the following reaction? 2K + S - - > K2S K*** S K2S None of these
  98. Physics

    What is the kinetic energy of an ideal projectile of mass 19.4 kg at the apex (highest point) of its trajectory, if it was launched with an initial speed of 29.2 m/s and at an initial angle of 46.9° with respect to the horizontal? I know kinetic energy
  99. college algebra

    The height of a projectile fired upward is given by the formula s = v0t – 16t2, where s is the height, v0 is the initial velocity and t is the time. Find the times at which a projectile with an initial velocity of 128 ft/s will be 144 ft above the
  100. math

    y′=(2y+x)/x, y(1)=4 1. The resulting differential equation in x and u can be written as xu'=------ 2.Separating variables we arrive at -----du= dx/x 3.Integrating both sides and simplifying, the solution can be written in the form u+1=Cf(x) where C