1. Chemistry

    Describe three ways you might be able to speed the reaction of CH4+Cl2 -> CH2Cl2+HCl (answer given by unknown member didn't seem correct)
  2. Science

    Describe the action and reaction force pairs involve when an object falls toward Earth. Ignore the effects of air resistance.
  3. Chemistry

    3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) standard enthalpy: -133.5 Find the change in internal energy for this reaction. Enter in kJ.
  4. chemistry

    Write a balanced equation for the proton transfer reaction between water and phosphate ion. Determine in which direction the equilibrium is favored.
  5. chem

    what would the equation for this reaction be?; KAL(SO4)2.12H2O crystallizes out when water is cooled enough to cause the soluble ions to coalesce and precipitate out of solution.
  6. chemistry

    Can aluminum (Al) react with K2SO4 by single replacement to yield products? Using the activity series chart, I know that K is more reactive than Al so does that mean that a reaction will occur or not?
  7. organic chemistry

    what is the major and minor product of 3-methyl 1-pentene + propanol reacted with sulfuric acid?! Detailed mechanism reaction please?? Thank you!
  8. chemistry (DrBob222)

    A student fails to fill the cuvette 2/3 full with the reaction mixture ( CV+ and OH-). What effect does this error have on the measured absorbance values? Thank you :)
  9. Chemistry

    How do you write the combination of: Na2CO3 AgNO3 (CO3 -2) and (Ag=1) Thanks! This is a double displacement reaction. silver carbonate and sodum nitrate form.
  10. chemistry

    Which of the following compounds would result in an exchange reaction if mixed in an aqueous solution with (NH4)2S? a. SrCl2 b. Li2C2O4 c. CH3CO2Ag d. MnSO4 I don't know what to look for.
  11. Chemistry

    For the oxidation-reduction reaction equation given here, 2Rb+Br2 --> 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product.
  12. Chemistry

    H2 +Br2 =2HBr so suggest twoo reasons why all the collisions between hydrogen and bromine gas molecules do bot result in reaction?
  13. chemistry

    What products are formed when aqueous solutions of Na2SO4, Fe3SO42, and BaCl2 are mixed together ? Can someone help me write out a balanced equation for the reaction that occurs.
  14. physical science

    Help please. Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate?
  15. Chem

    how many millimeters of 0.200M FeCL3 are needed to react with an excess of Na2S to produce 1.38g of Fe2S3 if the percent yield for the reaction is 65.0%
  16. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hypochlorous acid are combined.
  17. Physics

    An object of mass 10kg is placed on an inclined plane at 30 degree to the horizontal. Calculate the reaction between two surface and what is the coefficient of static friction.
  18. 7th grade

    A Pyrotechician is working on a new fourth of July rocket. He is using a highly reactive metal when burned. What can he use to lower the reaction rate????
  19. chemistry

    The rate constant for this first-order reaction is 0.320 s–1 at 400 °C. A--> Products How long (in seconds) would it take for the concentration of A to decrease from 0.830 M to 0.220 M?
  20. chemistry

    The equation for the reaction of sodium with water is as follows: 2Na(s) 2H2O(l) £ H2(g) 2NaOH(aq) How many liters of H2 are produced when 12.0 g of Na reacts with H2O at 293 K and 99.3 kPa?
  21. social studies

    Identify two reasons that explain why Britain and France thought that the policy of appeasement was the best solution as a reaction to Hitler's demands.
  22. chemistry

    Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. fluoroethane from ethanol
  23. World History

    Generally peasants and the lower castes had a more positive reaction to the teachings of the Buddha, since Buddhists did not support the concept of a ________.
  24. Chemistry

    What mass (g) of water is produced by the combustion of 48.8 g of propane according to the following reaction? Round your answer to one decimal place. C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O (l)
  25. Social studies

    What was the response by the states to Andrew Jackson's reaction to the Supreme Court decision in favor of the Cherokee in Worchester v. Georgia?
  26. Chemistry

    What volume of hydrogen, measured at 25 C and 1.00 atm can be produced by dissolving 5.0 g of magnesium in hydrochloric acid? (Write and balance the equation for the reaction first.)
  27. ap chemisrty

    When heated, cyclopropane is converted to propene. Rate constants for this reaction at 470°C and 510°C are k = 1.10 10-4 s-1 and k = 1.02 10-3 s-1, respectively. Determine the activation energy, Ea, from these data.
  28. AP Chemistry

    We drop 17.3 grams of magnesium into 435 mL of a 2 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP?
  29. chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of sodium hydroxide and perchloric acid are combined.
  30. chimestry

    150 ml of 0.4m nitric acid reacts with 100 ml 0.3m mg(oh)2. calculate the ph as poh of the solution after completion of the reaction. 2hno3+mg(oh)2-->mg(no3)2+2h2o
  31. Chemistry - Cell Potential

    Determine the delta G(o) and the equilibrium constant for the following reaction at 323 K. 2Br- + I2 --> Br2 + 2I- I got 100 kj/mol and K 7.19x10^16 but not sure if this is right
  32. Chemistry

    True or False? An increase in pressure for a system composed entirely of gases will cause the reaction to shift to the side that contains the larger number of moles.
  33. stoichiometry

    What mass of nitrogen monoxide can be made by the reaction of 8.00 g ammonia and 17.0 g oxygen? correct answer is 12.8 ± 0.1 (g) I keep getting 14.1 g and that the limiting reagent is NH3 What am I doing wrong?
  34. Chemistry

    The rate constant for this first-order reaction is 0.440 s-1 at 400 C. A to products How long in seconds would it take for concentration of A to decrease from 0.740 M 0.290 M?
  35. Chemistry

    What minimum volume of 3.0 M H2SO4 is required to produced 13 L of H2 at STP? Reaction formula: 2Al(s) + 3H2SO4(aq) --> Al2(SO4)3(aq) + 3H2 (g)
  36. Physical Science

    Predict the shift of equilibrium for each of the following conditions in the following reaction involving gaseous reactants and products: N2 + 3H2 = 2NH3 + heat
  37. chem

    How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products? 2CH3OH(g)+3O2(g)--->2CO2(g)+4H2O(g)
  38. chemistry

    Complete and balance the displayed half reaction in neutral aqueous solution taking into account the electrons. Mg(s) → Mg2+(aq)
  39. chem

    How many CO2 molecules would be formed from the reaction mixture that produces the greatest amount of products? 2CH3OH(g)+3O2(g)--->2CO2(g)+4H2O(g)
  40. chemistry

    I need to identify the elements oxidized and reduced and indicate which substances are the oxidizing and reducing agents for the redox reaction: PH3(g) + O2(g) → P2O5(s) + H2O(g)
  41. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.859 M and [Ni2 ] = 0.0190 M. Standard reduction potentials can be found here.
  42. Chemistry

    If 0.10 mol of Zn(s) is reacted to 150.0 ml of 1M HCl, what is the concentration of Zn+2 in the solution after the reaction is complete? Assume the solid zinc does not affect the volume.
  43. Biology

      Which one of the following reactions occurs in the cristae of the mitochondria?   A. The prep reaction  B. Glycolysis  C. The electron transport chain  D. The citric acid cycle  B? 
  44. Chemistry

    Complete the reaction: Methanol and propanoic acid are mixed. Okay, I got the two formulas: CH3OH + CH3CH2COOH ---> ??? ...now I don't know what to do. Lots of CH3's and CH2's. Help? Thanks!
  45. ap chemistry

    We drop 50.5 grams of magnesium into 572 mL of a 3 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP?
  46. Chemistry 112

    Can someone please explain to me how to calculate reaction order with respect to something? I've read this in my textbook, and I watched videos on YouTube, but I still don't understand. Please help.
  47. chem

    I don't understand ehat is the chemistry behind the ASA – FeCl3 reaction? what is this question even asking? any response will do so plz help (Broken Link Removed)
  48. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of potassium hydroxide and nitrous acid are combined.
  49. organic chemistry

    assuming the reaction goes to completion, calculate the volume of 6M KOH needed to completely neutralize all of the hydrogen bromide formed.
  50. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of hydroiodic acid and barium hydroxide are combined.
  51. AP chemistry

    Given the standard molar entropies measured at 25 C and 1 ATM pressure calculate delta S for the reaction 2al + 3 mg0 ---> 3mg + al2o3
  52. Chemistry

    Use bond energy values to estimate delta H fro the following reaction in the gas phase: C2H4 + Br2 -> CH2BrCH2Br I am in dire need of help! Thank you
  53. Chem

    Calculate the Go for the oxidation of 5 moles of tin in the following balanced reaction. 16HCl + 2KMnO4 + 5Sn ---> 5SnCl2 + 2MnCl2 + 2KCl + 8H2O
  54. CHemistry

    write the balanced net ionic equation that shows the formation of Fe(OH)3 in the reaction of iron (III) nitrate with sodium hydroxide. Please help
  55. science, chemistry

    Separate this redox reaction into its component half-reactions. O2+2Cu---->2CuO thought it was: Oxidation 2e-+O2---->2O(-2) Reduction Cu---->Cu(2+)-2e- but this is wrong
  56. chemistry

    A S.T.P.how many litres of hydrogen can be obtained from the reaction of 500cm3 of 0.5M H2SO4 with excess zinc metals?(molar volume of H2 at stp=22.4dm3).
  57. chemistry

    When HgO is heated, it decomposes into elemental mercury and molecular oxygen gas. If 66.0 g of Hg is obtained from 82.0 g of the oxide, what is the percent yield of the reaction?
  58. Chemistry

    For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?
  59. Science

    Can anyone exlplain how particles behave in the reaction between iron and sulphur???!!! Ive checked all over google and cant find any helpful answers!!! PLZ HELP ME!!
  60. chem

    Consider the chemical reaction, 2Al + 3Cl2 → 2AlCl3. Here, 56 g of Al can produce 415.14 g of AlCl3 (Molar masses: Al = 26.98 g; Cl = 35.45 g). true or false
  61. Chemistry

    How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation.
  62. Chemistry

    The standard enthalphies of formation of ozone, O3(g), and oxygen atoms are +142.70 and +249.17 kJ/mol. Calculate the reaction enthalpy for 2O2(g)-->O3(g)+O(g)
  63. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.859 M and [Ni2 ] = 0.0190 M. Standard reduction potentials can be found here.
  64. Chemisry

    What is the minimum amount of 5.2M H2SO4 necessary to produce 22.8g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) (Please be precise and clear)
  65. Genral Science

    What C word defines a substance that speeds a chemical reaction without being consumed? http://en.wikipedia.org/wiki/Catalysis
  66. chemistry

    we did a lab where we mixed an iron nail with cupric chloride to find the reaction is this the balanced equation... Fe + CuCl2 --> FeCl2 + Cu or would Fe and Cl bond different??
  67. HCA 220

    can someone explin how blood clotting, immune response, allergic reaction, and hormone release interrelate. I have been searching and can't find anything
  68. Chemistry

    what mass of hydrogen must be reachted with excess nitrogen to produce 5000. J of energy based on the reaction: 3H2+N2--> 2NH4+2709J
  69. Chemistry

    How many grams of commercial C2H4O2 (97% pure by mass) must be allowed to react with an excess of PCl3 to produce 75.0g of C2H3OCL if the reaction has a 78.2% yield?
  70. Chemistry

    What are the formulas of the salts that precipitate when the reaction mixture (n-butyl alcohol, sodium bromide, water, and sulfuric acid) is cooled?
  71. Chemistry

    What mass of precipitate will form if 1.50L of concentrated Pb(ClO3)2 is mixed with 0.200L of 0.280M of NaI? Assume the reaction is complete
  72. Chemistry

    For the oxidation-reduction reaction equation given here, 2Rb+Br2 --> 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product.
  73. chemistry

    13. The salt that is formed during the reaction between potassium hydroxide and hydrochloric acid is _____. (1 point) NaCl H2O KCl K2Cl
  74. Chemistry

    What are the individual orders of the reactants involved in the oxidation of methylene blue by ascorbic acid? Rate of reaction= [MB+]^m * [H2A]^n * [HCl]^p What are m, n, and p?
  75. chemistry

    using the balanced equation for the fermentation reaction, calculate for the theoretical amount of alcohol to be produced using 10 grams of sucrose. 0.79 g/ml is ethanol's density.
  76. chemistry

    Consider the following unbalanced reaction: Fe2O3 (s) + CO (g) --> Fe (s) + CO2 (g) How many moles of carbon dioxide are produced per mole of iron (III) oxide reacted.
  77. Chemistry

    Please help !!!! In addition to the main product what are two side reactions that could occur in the experiment of The Diels-Alder Reaction of Cyclopentadiene with Maleic Anhydride. Thanks
  78. SCIENCE

    In a reaction 6.56g of Zinc reacted with excess dilute Hydrochloric acid Calculate the volume of hydrogen evolved at STP
  79. chemistry

    How much heat (in kilocalories) is evolved or absorbed in the reaction of 1.60 g of Na with H2O? 2Na(s)+2H2O(l)→2NaOH(aq)+H2(g), ΔH = -88.0 kcal (-368 kJ)
  80. chemistry

    Reaction with Felings solution,if adding 2-butanol to potassium dichromate, in this experiment what spiecfic organic product would be form and structure.
  81. CHEMISTRY

    If an explanation for correct answer could be provided, that would be great! Which equilibrium constant indicates that the reaction will produce mostly products? a. Kc = 3.46x10-6 b. Kc = 1.96x10+7 c. Kc = 0.319 d. Kc = 0.37
  82. chem

    whats the net ionic equation for the following reaction AgNo3(aq)+Na2SO4(aq) answer 2Ag+(aq)+SO42- (aq)___> Ag2So4(s) correct?
  83. children graowing up

    the final stage in an acute distress reaction prompted by separation is often ? a.dispair b.detachment c.resentment d.protest my answer is b
  84. Chemistry

    A precipitate forms when solutions of sodium carbonate and calcium nitrate are combined. Write the net ionic equation for this reaction. Please help
  85. Chemistry

    Write the net ionic equation for the reaction between sodium chloride and cobalt (ll) nitrate. so far i have... 2NaCl(aq)+ Co(NO3)2(aq)---> NaNO3(aq)+CoCl2(s)
  86. chemistry

    0.43g limestone and 98cm3 of carbon dioxide are produced on reaction with excess hydrochloric acid. How much calcium carbonate is present?
  87. chemistry

    Balance each of the following redox equations using the half-reaction method. HI(s) + H2SO4 (aq) --> H2S(g) + I2 (s) My only question about this equation is...how do I know how many electrons I need to put on both sides? Other than that I know how to do
  88. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.859 M and [Ni2 ] = 0.0190 M. Standard reduction potentials can be found here. Cr+Ni(2+) ->Cr(2+) + Ni
  89. chemistry

    the reaction is......CaCO3+2HCl---->CO2+H2O+CaCl2. what mass of HCl will be neutralized by 0.50g ofCaCO3? How do i figure this out in a non-complicated way??
  90. organic chemistry

    If, by mistake, a chemist used 100% ethanol rather than diethyl ether as the reaction solvent, would the Grignard synthesis still proceed as expected?
  91. Chemistry

    Identify the atom that increases in oxidation number in the following redox reaction. 2MnO2 + 2K2CO3 + O2 2KMnO4 + 2CO2 *A.) Mn B.) O C.) K D.) C Please show work Thank you.
  92. ap chemistry

    Consider the reaction Ni(s) + 4CO(g) ! Ni(CO)4(g) Assuming the gases are ideal, calculate the work done on the system at a constant pres- sure of 1 atm at 75C for the conversion of 1.00 mole of Ni to Ni(CO)4.
  93. Chemistry

    I need help with Stoichiometry Mapping and solving using the "line bar" method Cl2P4(s)+6Cl2(g) --> 4PCl3(g) How many mL of PCl3 can be produced by the reaction of so g of Cl2(g)
  94. chemistry

    What would Qc be if the volume of the container decreased by a factor of 1.774 for the following reaction? PH3(g) + BCl3(g) → PH3BCl3(s) KC = 534.8 at 353.0oC
  95. Chemistry

    Nitrogen can also be produced from sodium metal and potassium nitrate by the reaction: Na(s) +KNO3 (s) --> K2O(s) +Na2O(s) + N2(g) If we generate oxygen by the thermal decomposition of potassium chlorate: 2KClO3(s) --> 2KCl(s) +3O2(g) How many grams
  96. Chemistry

    86.3 g of water in a calorimeter have an initial temperature of 24 degrees C. The temperature increased to 33.1 degrees C when 54.3 g of a sample of metal initially at 99.7 degrees C is added to the calorimeter and allowed to equilibrate with the water.
  97. Chem8

    The decomposition of XY is second-order in XY and has a rate constant of 0.00895 M-1s-1 at a certain temperature. If the initial concentration of XY is 0.194 M, how long (in seconds) will it take for the concentration to decrease to 0.047 M?
  98. chemistry

    A sample of nitrogen gas has the temperature drop from 250°C to 150°C at constant pressure. What is the final volume if the initial volume is 310 mL?
  99. Chem10

    The decomposition of XY is second-order in XY and has a rate constant of 0.00599 M-1s-1 at a certain temperature. If the initial concentration of XY is 0.174 M, how long (in seconds) will it take for the concentration to decrease to 0.054 M?
  100. chemistry

    One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction: NH4Cl (s) <=> NH3 (g) +HCl (g) A) calculate Kp of the above system at the temperature of the experiment if the partial pressure of