1. chemistry

    A plot of ln k vs. 1/T for the reaction gave a line with a slope - 3250 kelvin determind the energy of activation?

    asked by dea on March 28, 2011
  2. Chemistry

    A chemist ran the reaction and obtained 5.70 of ethyl butyrate. What was the percent yield? How do I solve this problem?

    asked by Nancy on December 6, 2011
  3. Chemistry

    If a procedure calls for 2mL of a concentrated nitric acid, what are the mass and moles of the HNO3 actually used in the reaction?

    asked by Dem on September 6, 2012
  4. Thermodynamics (Chemistry)

    Ag(s) + Cl2(g) --> 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?

    asked by Alfred on August 8, 2011
  5. chemistry

    In the reaction of sodium metal with oxygen gas, the formula of the product will be ______________. Periodic Table

    asked by jon on July 19, 2011
  6. Physical chemistry

    Ag(s) + Cl2(g) --> 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?

    asked by Alfred on August 8, 2011
  7. Chemistry for Bob

    Do you mind posting up an example for that please? It would help out a out: What is the activation energy for a reaction whose rate tripled when temperature rose from 28 to 53C.

    asked by Jeena on March 15, 2010
  8. ap chemistry

    Consider the reaction 2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ?

    asked by cheri on October 31, 2012
  9. chemistry

    what is the pressure of H2 if the hydrogen gas collected occupies 14L at 300K and was produced upon reaction of 4.5 mol of Al?

    asked by brenda on March 14, 2010
  10. Physical Education help

    The body's reaction to information is to send these to the brain. A. Neurons B. Impulses C. Dendrites D. Synapse Is the answer B? Thank you

    asked by Anonymous on October 25, 2014
  11. AP Chemistry

    For the reaction 2C6H6+15O2 =12CO2+6H2O, what is the maximum amount of CO2 which could be formed from 5.12 g of C6H6 and 12.28 g of O2?

    asked by Anonymous on September 7, 2013
  12. Chemistry- Please Help!!

    Predict the proper equilibrium constant expression for the following reaction... Fe(OH)3(s) ----> Fe3+(aq) + 3 OH-(aq) Explain the reasoning behind your answer.

    asked by Kelly on July 27, 2013
  13. Chemistry

    Write an equilibrium reaction equation for each of the following buffer mixtures: a)NH3(aq) and NH4Cl(aq) b)HC7H5O2(aq) and NaC7H5O2(aq)

    asked by Anonymous on January 7, 2018
  14. chemistry

    what mass of salt can be produced from the reaction of 3.45 grams of sodium hydroxide and an excess of hydrochloric acid?

    asked by Alexis on April 27, 2010
  15. chemistry

    what is the coefficients on Oxygen in the balanced equation for the following hydrocarbon combusion reaction C7H14 + O2 = CO2 + H2O

    asked by Doss on October 25, 2011
  16. chemistry

    what is the gas formed when baking soda is added to vinegar? complete the reaction: NaHCO3(s) + CH3COOH(aq)

    asked by shay on October 3, 2012
  17. Ochem Lab

    Suggest an appropriate reducing reagents for the following substrates and predict the reaction:(1) 2-hexanone, (2)ethyl 4-nitrobenzoate, (3) hexanal

    asked by sady on February 8, 2009
  18. 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.

    asked by Melissa on November 9, 2010
  19. O-CHEM

    Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each

    asked by Nina on February 3, 2009
  20. Organic Chemistry I

    You have isolated one of the isomeric dimethylcyclopentanes. on reaction it gives you 3 monochloroisomers, which of the possible pentanes is it? How do i do this? they don't give any choices, so how do i figure it out?

    asked by Nick on October 18, 2010
  21. Chemistry

    Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each

    asked by Nina on February 4, 2009
  22. Science PLEASE HELP

    How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)

    asked by Anonymous on November 23, 2014
  23. chemistry

    The basicity of tetraoxosulphate(6) is 2. explain this statement with an equation showing the reaction between the acid and potassium hydroxide

    asked by Ayibadenyifa on May 9, 2016
  24. Chemistry

    Enter the net ionic equation, including phases, for the reaction of AgNO3(aq) with BaO(aq). Is it... Ag+O2--->AgO?

    asked by Chelsea on October 13, 2013
  25. chemistry

    Na3PO4(aq) + AlCl3(aq) produces? Complete and balance each of the following equations. If no reaction occurs, write NOREACTION.

    asked by Anonymous on October 9, 2010
  26. Chemistry

    What mass of calcium carbonate reaction with hydrochloric acid yields 44L of the gas at 27 ° C and 1520 mm Hg?

    asked by Nadia on January 26, 2016
  27. chemistry

    a. what is the effect on the Kc when the temperature of an exothermic reaction is lowered? b. according to Le Chatelier's principle, how is equilibrium in part a established.

    asked by Boo Boo on November 30, 2012
  28. Chemistry

    Consider the reaction 2 Al2O3(s) → 4 Al(s) + 3 O2(g). ∆H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ?

    asked by Mary on January 10, 2014
  29. AP Chem

    A first-order reaction has a rate constant of 0.547 min - 1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? Not sure how to do this!

    asked by Andrea on March 5, 2018
  30. Chemistry

    20. What is the molecular formula for alkane, alkenes and alkynes? 15.What happens to a reaction at equilibrium when more reactant is added to the system?

    asked by BLAH on May 10, 2016
  31. Chemistry

    If 0.120 moles of water are produced in the reaction H+(aq)+OH-(aq)=H2O deltaH=-56.2kj/mol what is qrxn

    asked by Nick on October 23, 2011
  32. chemistry

    In the redox reaction: 4NH3(g)+3O2(g)-->2N2(g)+6H2O(l) the number of moles of electrons transferred is...

    asked by Metia on May 3, 2010
  33. physics hw

    Determine the stopping distances for a car with an initial speed of 87 km/h and human reaction time of 2.0 s for the following accelerations. (a) a = -4.0 m/s2 (b) a = -8.0 m/s2

    asked by kylie on December 15, 2016
  34. Chemistry

    For the following reaction, identify the substance oxidized, reduced and the oxidizing and reducing agents. 2SO2 + O2 ----> 2SO3

    asked by Adam on October 30, 2013
  35. chemistry

    For the following reaction, identify the substances oxidized, reduced and the oxidizing and reducing agents? 2SO2 + O2 --> 2SO3

    asked by mandy on October 30, 2013
  36. chemistry

    Which term in the following reaction would not be included in the equilibrium expression? 2 Na3PO4 (aq) + 3 MgCl2 (aq) → 2 Mg3(PO4)2 (s) + 6 NaCl (aq)

    asked by barbra on November 4, 2010
  37. chemistry

    if a reaction vessel contains 11.5g NH3, 12.0g O2, and 10.5g CH4, what is the maximum mass in grams of hydrogen cyanide that could be made?

    asked by robert on October 13, 2012
  38. chemistry

    For the following reaction, identify the substances oxidized, reduced and the oxidizing and reducing agents? 2SO2 + O2 --> 2SO3

    asked by mandy on October 30, 2013
  39. physics

    What reaction would you get from francium and water in outer space and what if you added hydrogen to the experiment as far as being used for fuel for travel

    asked by scott on January 17, 2012
  40. 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-

    asked by Monique on November 11, 2011
  41. Science

    How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)

    asked by Anonymous on November 23, 2014
  42. Chemistry

    Redox Reactions Can anyone help predict the reaction that will take place when Gold is put into a solution of Hydrochloric Acid?

    asked by Anonymous on March 1, 2008
  43. ap chemistry

    what is the galvanic cell for the redox reaction between sodium dichromate and mercury(I) nitrate in an acidic solution.

    asked by brian on October 15, 2010
  44. 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?

    asked by help on November 8, 2010
  45. 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)

    asked by Anonymous on May 3, 2010
  46. chemistry

    How many grams of Ni(OH)2 are produced from the reaction of 25.0mL of a 0.600M NaOH solution? NiCl2(aq)+2NaOH(aq)→ Ni(OH)2(s)+2NaCl(aq)

    asked by anatasya on November 4, 2013
  47. Chemistry

    What amount of ammonium sulfate is produced by the reaction of 8.48g of ammonia with 24.50g sulfuric acid?

    asked by benji on May 4, 2016
  48. 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.

    asked by Amanda on November 22, 2014
  49. Chemistry

    Complete and balance the precipitation reaction. Include physical states in your answer. CuCI2(aq)+Na2CO3(aq)

    asked by Tiara on May 4, 2016
  50. organic chemistry

    Assuming that an average 1 oz of black tea contains approximately 6 mg of caffeine, determine the experimental and %yield of the reaction.

    asked by Mary on April 7, 2010
  51. chemistry

    Phosphorus (p4) burns in the air to give diphophorus pentoxide. what is the blance chemical equation for the reaction

    asked by Alexis A on October 29, 2013
  52. Biology

    How do u figure out the initial rate of an enzymatic reaction when they only give the time in seconds and the product formed?

    asked by Anonymous on October 7, 2007
  53. 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+

    asked by Anon on December 2, 2012
  54. Chemistry

    if the pressure was increased in this reaction : 2NO(g)+ O2 =====> 2NO2

    asked by Happy Camper on March 27, 2007
  55. chemistry

    what mass of salt can be produced from the reaction of 3.45 grams of sodium hydroxide and an excess of hydrochloric acid?

    asked by Alexis on April 25, 2010
  56. Chemistry

    What's the net ionic equation for the reaction: PH3(g) + O2(g) → P2O5(s) + H2O(g)? Please show your work so I can follow Thanks!!

    asked by Wade on May 7, 2018
  57. chem

    How many grams of NH3 are required to make 52.7g H2O in the following reaction : 4NH3+6NO->5N2+6H2O

    asked by bob on September 28, 2013
  58. Chemistry

    How much heat (in kilojoules) is evolved or absorbed in the reaction of 3.35 of with enough carbon monoxide to produce iron metal?

    asked by LaK on December 10, 2012
  59. chemistry

    Consider the reaction 3CH4(g)= C3H8(g)+ 2H2(g). Using data from Appendix C in the textbook, calculate delta G at 298 K.

    asked by Anonymous on February 14, 2012
  60. chem

    6FeO3----->4Fe304+02 DELTA H=+ 392kj If 2.83 g of Fe2O3 decomposed according to the above reaction , how many kj of heat would be exchanged with the enviroment?

    asked by lauren on October 15, 2009
  61. Chemistry

    What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)

    asked by Jordan on November 14, 2014
  62. Chem Help Please!

    Give the full mechanism for the reaction of 1-bromo-3-methylpentane with methanol. I know you cant draw on here. but can you tell write it out with words? Thanks!

    asked by Kimberly on October 14, 2014
  63. Chem - Stoichiometry

    How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!

    asked by Erin on October 17, 2009
  64. pmdc

    Calculate the mass of Mg metal required to consume 2560g of CO2 in the reaction. 2Mg+CO2_2MgO+C

    asked by Asad khan on August 28, 2014
  65. Chem - Stoichiometry

    How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!

    asked by Erin on October 18, 2009
  66. science, biology

    How might the chewing of food be related to the rate of a chemical reaction-digestion- that occurs in your body? explain

    asked by me on March 1, 2009
  67. chemistry

    what is the relationship between reaction rate and shape of equilibrium graph in terms of concentration versus time?

    asked by sarah on April 17, 2010
  68. gen chem

    what is the pK (=-logK)at 25C for the reaction below? Cl2(g)+6H2O(l)+5Cu2+(aq)2ClO3-(aq)+12H+(aq)+5Cu(s) E0=-1.133V

    asked by Chem on May 8, 2010
  69. Chemistry

    How do I find the POtential Energy for a reaction from strontium chloride and potassium carbonate? and what is the chemical reactions for the above

    asked by SBB on November 30, 2011
  70. chemistry

    Silver is electroplated at the cathode of an electrolysis cell by 1/2 reaction Ag(aq) + e- --> Ag(s). How many moles of electrons are required to electroplate 5.8g of Ag?

    asked by Ashley on November 30, 2011
  71. PHYSICS

    What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

    asked by JJ on November 21, 2010
  72. PHYSICS

    What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

    asked by JJ on November 21, 2010
  73. chm152

    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

    asked by ami on March 27, 2010
  74. chm152

    At a particular temperature, Kc = 54 for the reaction H2(g) + I2 (g) 2 HI(g). One mole of HI is placed in a 3.0-L container. What would be the equilibrium concentration of HI? Choose one answer. a. 0.035 b. 0.071 c. 0.29 d. 0.30 e. 0.33

    asked by AMI on March 28, 2010
  75. Chemistry

    Do chemists speed a reaction by using bunsen burners or steam baths because this lowers the activation barrier?

    asked by Ashley on October 9, 2011
  76. chemistry

    Determine how many milliliters of 0.255 M HClO4 will be required to neutralize 48.56 g Ca(OH)2 according to the reaction: 2HClO4(aq)+Ca(OH)2(s)=CA(ClO4)2(aq)+2H2O(l)

    asked by johnel on December 3, 2012
  77. Chemistry 12

    If two students compared their instantaneous reaction rates, would you expect their results to be the same? Explain (Hint: Think of tangent.)

    asked by Amy on September 9, 2013
  78. Chemistry

    How could you prove that sodium hydroxide is a base without using litmus papes to test? Give an equation for the reaction

    asked by Divine on September 18, 2014
  79. College Chemistry

    what is the maximum weight of CuCl that can be prepared from the reaction sequence using 1.0g of Cu turnings to prepare the Cu2+ solution?

    asked by Maggie on October 7, 2010
  80. Science

    How would you prove that sodium hydroxide is a base without using a litmus paper to test? Give the equation for the reaction?

    asked by Wissy on April 28, 2016
  81. gen hem

    what is the free energy change in kJ for the reaction below? 2NO3-(aq)+8H+(aq)+3Hg(l) 2NO(g)+4H2O(l)+3Hg2+(aq) E0=0.106V

    asked by Chem on May 8, 2010
  82. Organic Chemistry

    What is the mechanism of action between sodium benzoate (NaC6H5COO) and hydrochloric acid (HCl)? I need to know where the electrons go in this reaction.

    asked by BOB on October 11, 2011
  83. Chemistry

    How many grams of dichloromethane result from reaction of 2.62 kg of methane if the yield is 43.5 %? CH4+2Cl -> CH2Cl2+2HCl

    asked by Melia on November 5, 2012
  84. Organic Chemistry

    what is wrong with the idea that the reaction of maleic acid with zinc and aqueous HCL would yield tetrahydrofuran?

    asked by Melody on October 30, 2010
  85. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  86. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  87. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  88. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  89. Chem 11

    How many grams of O2 are required to produce 255grams of SO2 in following reaction? 4FeS2+11O2===> 2Fe2O3+8SO2

    asked by Emmy on October 20, 2010
  90. organic chemistry

    What is the product of reaction of triphenylmethanol heated up with 40% HI in glacial acetic acid and then treated with sodium bisulfite?

    asked by Chris on November 16, 2010
  91. chemistry

    Write a balanced chemical equation for the reaction that occurs when the hydrocarbon styrene, {\rm C}_{8}{\rm H}_{8}(l), is combusted in air.

    asked by seema on October 4, 2011
  92. Chemistry

    The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1 b. 0.693 s-1 c. 0.0693 s-1 d. 0.144 s-1 e. 3.01 s-1

    asked by Shines on December 6, 2013
  93. chemistry

    How do you write a balanced equation for the preparation of phenylmagnesium bromide and it's reaction with benzophenone followed by neutralization in acid?

    asked by Anonymous on November 9, 2014
  94. Chem!!

    The value of ƒ¢H‹ for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO(g) reacts completely. 2CO(g) + O2(g) ¨ 2CO2(g)

    asked by Harlem on June 6, 2012
  95. chemistry

    write and equation for the reaction of triethylamine and water. does the eqilibrium go to the right or left. so far what I have is C6H15N + H2O but I'm not sure of the products

    asked by casey on April 12, 2012
  96. Chemistry

    How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid: Zn + 2HCl -> ZnCl2 + H2

    asked by Christina on November 9, 2009
  97. chemistry

    Write a balanced equation showing the solubility equilibrium reaction of solid calcium hydroxide??

    asked by Anonymous on April 11, 2012
  98. chem

    4Fe(s) + 3O2(g) → 2Fe2O3(s) Identify the type of chemical reaction represented by this equation. is it redox?

    asked by Anonymous on April 21, 2009
  99. Chemistry

    How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid: Zn + 2HCl -> ZnCl2 + H2

    asked by Julie on November 9, 2009
  100. Chem

    Complete and balance the reaction of A) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→

    asked by Alex on June 2, 2014