1. Chemistry

    How can I tell from a graph of temperature vs. time if a reaction is endothermic or exothermic?
  2. chemistry

    write a balanced equation for the chain reaction AL2O3
  3. chemistry

    what is a double replacement precipitation reaction and limiting reactants
  4. ap chem

    What volume of 5M HF will 4g Ca react completely according to the reaction Ca+2HF-->O+CaF2+H2
  5. science

    when a liquid wax is turned into a solid is it a chemical reaction?
  6. Psychology

    How could having a Type A personality affect a person’s reaction to stress?
  7. science

    Name the type of reaction that the equation represents? 2Cu + O2 -------> 2CuO
  8. chemistry

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

    what is the numerical value of the equilibrium constant Kgoal for the reaction CO2(g) C(s) +O2(g)
  10. chemistry

    is putting gas in a vehicle a physical or chemical reaction
  11. kumar

    The addition of a catalyst during a chemial reaction alters which of the following quantities?
  12. Science

    The reaction between sulphuric acid and iron (III) hydroxide [Fe(OH)3] gives
  13. chemistry

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

    Why would methanol be used to halt a secondary alcohol and catalyst reaction?
  15. chemistry

    Why would methanol be used to halt a secondary alcohol and catalyst reaction?
  16. Science help please, thanks!

    Can you maybe give me two examples for action-reaction forces? I'm curious. Thanks!
  17. chemistry

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

    How much heat is produced by the complete reaction of 5.91kg of nitromethane?
  19. chemistry

    C+HNO3=H2CO3+H2O+NO2 which type of reaction is it.
  20. chemistry

    what is the rate law for NO+O3=NO2+O2 in second order reaction if [NO] Doubled
  21. Chemistry

    The chemical equation for ionic reaction between Na2S and AgNO3??
  22. chemistry

    When 24.2 kg of Fe2O3 react with 14.5 kg of CO and 5.4 kg of Fe are recovered, what is the percent yield for the reaction?
  23. college chemistry

    How many grams of Mg(OH)2 can be prepared from the reaction of 20.0g of Mg3N2 with 10.0g of H2O?
  24. analytical chemistry

    chemical equilibria involved in precipitation reaction
  25. chemistry

    equation of the reaction of hydrochloric acid and iron sulphide
  26. organic chemistry

    how do you increase the yield of triphenylmethanol in a grignard reaction?
  27. organic chemistry

    how do you increase the yield of triphenylmethanol in a grignard reaction?
  28. chemistry

    What is a complete ionic equation for the reaction between Pb(NO3)2 and NaI?
  29. chemistry

    Account for the increase in reaction rate brought about by a catalyst.
  30. Chemistry

    Calculate Kp at 298K for the reaction SO2 + NO2--->SO3 + NO
  31. chem

    is An antacid neutralizes stomach acid. a chemical reaction?
  32. Chemistry

    How many grams of Ni(OH)2 are produced from the reaction of 45.0mL of 1.75 M NaOH solution?
  33. Chemistry

    Classify each reaction and balance the equations. Al(OH)3 ==> Al2O3 + H2O
  34. Chemistry

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

    WHICH IS LIMITING REAGENT IN FOLLOEING REACTION 3Mg +N2 =Mg3N2
  36. Chemistry

    Balance Redox using reactions by the 1/2 reaction method. NaIO3 (aq) + KI (aq) -->„³ I2 (s)
  37. chemistry

    what type of reaction is 2KCLO3+heat-2KCL+3O2
  38. chemestry

    given 43 moles of KCl how much HNO3 is needed to complet the reaction
  39. Chemistry

    In the. Reaction (Na2co3+CaCl2-->2NaCl+caco3) The precipitate is :
  40. CHEMISTRY

    How many oxidation states Should a substance have at least to undergo Disproportionation reaction ? thanks
  41. Science

    Is this statement true or false? An antigen causes an allergic reaction. Please and thank you!
  42. science

    explain the Eutectic and Eutectoid reaction in cast irons
  43. Chem

    Write the balanced overall reaction from these unbalanced half-reactions ln--->ln^3+ Cd^2+--->Cd
  44. Science

    In the reaction X+Y (R) Z, Z is the A)Substrate B)Product C)Enzyme D)Carbon Molecule
  45. science

    In the reaction X+Y (R) Z, Z is the A)Substrate B)Product C)Enzyme D)Carbon Molecule
  46. Science

    In the reaction X+Y (R) Z, Z is the A)Substrate B)Product C)Enzyme D)Carbon Molecule
  47. Chem

    How do you predict when a reaction goes non-spontaneous if you have delta h Stotal and deltaS
  48. chemistry

    How many grams of dichloromethane result from reaction of 1.60 of methane if the yield is 48.8 ?
  49. College Chemistry

    Quick Question - For a spontaneous reaction, ΔS°>0 and K >1. Is this always?
  50. Chemistry

    Why does sulfric acid make the electrolysis reaction of H2 and O2 go more rapidly?
  51. Chemistry help

    Why is it important for the reaction beaker to be completely dry before weighing?
  52. Chemistry

    What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)
  53. biology

    does dark reaction helps in transmittance and conservation of energy
  54. chemistry

    classify each reaction and balance the equation Al(OH)3--> Al2O3 + H2O
  55. Chemistry

    Here is a chemical reaction Fe + O2--> Fe2+O3 what was Antonie Lavoiser rusting?
  56. chemistry

    According to this chemical reaction, which is the number of grams of Fe produce from 14 moles of H2?
  57. Chemistry

    How can you determine the oxidizing agent in a reaction of iron with chlorine?
  58. chemistry

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

    How to solve CoCl2+HO2- ------> Co(OH)3+ Cl- by half reaction method
  60. biology

    how is it possible for an enzyne to lower the required energy of activation for a reaction.
  61. science

    Write an equation to show reaction of pop with water
  62. chemistry

    What are the products of the reaction between nitrous acid and strontium hydroxide?
  63. English

    Contrat the reaction of Hamlet, Laertes to their father's death.
  64. science

    what is the difference between a chemical reaction ans physical separation.
  65. bio

    How is the oxygen production in 30 seconds related to the rate of the reaction?
  66. Chemistry

    Hello, Is there a reaction when NaNO3 is added to some H2O? Or does it just dissolves? Please explain why, thanks!
  67. chemestry

    consider the reaction 2N2O(g) == O2(g)+2N2(g).which of the following will cause a shift in the equilibrium to the left?
  68. chemistry

    The "REVERSIBLE" chemical reaction- A + B <--> C + D Kc = CD / AB =4.4 Concentration at the start and after equilibrium- A = 1.00 M --> (1.00 - X) M B = 2.00 M --> (2.00 - X) M C = 0.00 M --> X M D = 0.00 M --> X M 4.4 = X^2 / (1.00-X)(2.00 - X) I'm not sure ...
  69. chemistry

    is it possible to have an acid/base reaction and produce a precipitate as a product as well?
  70. chemistry

    n the reaction 2CO(g) + O2(g) ® 2CO2(g) what is the correct expression of the rate?
  71. Chem4

    For the reaction A + 1/2 B --> 2 C, when C is increasing at a rate of 0.018 M/s, how fast is B decreasing?
  72. Organic Chemistry

    The reaction of (Z)-butenedioic acid with 1,3-cyclopentadiene gives only one product. Why?
  73. chemistry

    the reaction with ammonium hydroxide with the following metals: Fe3+ Mn2+
  74. Chemistry

    How do I balance the following into an equation? 10 mL of 2.0 M HCl is react with 8 mL of 1.7 M Ca(OH)2 in a neutralization reaction.
  75. Chemistry

    Write the equation for the reaction of mixing 2 ml of 3 M (HO)2SO2 with 9 ml of 0.2 M NaClO4
  76. bio

    How is the oxygen production in 30 seconds related to the rate of the reaction?
  77. Chemistry

    The half life for a first order reaction is know to be 4.5 h. How long will it take for 85% to be decomposed, in h?
  78. chemistry

    What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2
  79. science

    Is an icing propane regulator concidered an endothermic reaction?
  80. electrochemistry gr 12

    Will there be a reaction is a magnesium strip is placed in a solution containing Ca2+ ions?
  81. chemistry

    your reactants are two compounds composed of ions. what type of reaction do you probably have?
  82. chemistry

    Hello this is ellie again. I was wondering could you explain what a bombardment reaction is and and show an example of it? Thanks
  83. chemistry

    what amount of ethanol is needed for combustion reaction for a 20 oz bottle?
  84. chemistry

    1. In the reaction 2Ca(s) + O2(g) → 2CaO(s), which species is oxidized?
  85. Huck fin

    If you have read Huckleberry Finn before, what was your initial reaction to it?
  86. chem

    What does it mean when the sulfuric acid in a chemical reaction is written ABOVE the arrow?
  87. Chemistry

    what type of reaction occurs in Al+SnCl4 ? and what is the balanced equation
  88. Organic Chemistry

    The following reaction would produce a(n) __________. R-OH + R'COOH →
  89. chemistry

    How many {\rm NO}_{2} molecules would form as products if the reaction had a percent yield of 75\%?
  90. Chemistry

    For a certain reaction, Kp = 3.54 at 325 C. Find delta G 598 K in kJ/mol.
  91. Science

    Write a mechanism for the aldol reaction of 3,3-dimethyl-2-butanone.
  92. chemistry

    Does particle size have more or less of an effect on the rate of reaction than temperature?
  93. chemistry

    What is the ∆G for the following reaction under standard conditions (T = 298 K) for the formation of NH4NO3(s)?
  94. sds chemisry

    diffren between endotermic reactin and exotermic reaction
  95. Chemistry

    When We Balance Equations In Chemical Reaction,we Are Obeying The Law Of
  96. chemistry

    what mass of excess reactant remians when the reaction is completed?
  97. Chemistry (reactions)

    Ch3Ch2Ch2MgBr + H2O = I just need to complete the reaction not balance it.
  98. Chemistry

    How many atoms of iron will be produced from the reaction of 50 g of hematite and 25 g of carbon?
  99. Bio lab question 2

    What does adding an acid to an enzyme do to a reaction?
  100. chem 2

    calculate kc for reaction I2 (g)+Cl2 (g)⇌2ICl(g )Kp=81.9 (at 298 K)
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