1. Chemistry

    Afirst order reaction completed the 90%in 30minute find the time for99.9%,,,,

    asked by Anonymous on December 20, 2017
  2. chemistry

    Write a balanced chemical equation for the overall cell reaction represented as: a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b) Al(s)|Al^3+(aq)||Cu^2+(aq)|Cu(s) c) Pt(s)|Fe^2+(aq), Fe^3+(aq)||MnO4^-(aq),Mn^2+(aq)|Pt(s)

    asked by Jazmin on March 1, 2011
  3. chemistry

    Write a balanced chemical equation for the overall cell reaction represented as: a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b) Al(s)|Al^3+(aq)||Cu^2+(aq)|Cu(s) c) Pt(s)|Fe^2+(aq), Fe^3+(aq)||MnO4^-(aq),Mn^2+(aq)|Pt(s)

    asked by Jazmin on March 1, 2011
  4. College Chemistry..Urgent!

    THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)

    asked by shanice on December 8, 2010
  5. College Chemistry Really Need Help

    THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)

    asked by KEVIN on December 7, 2010
  6. Chemistry

    What is the theoretical justifaction for the order of reaction rates of a cycloalkane, cycloalkene, and benzene?

    asked by Olivia on December 7, 2010
  7. Chemistry

    What type of reaction occurs between zinc and Acetic acid? I think it is double replacement but I am not sure. Thank for the help :)

    asked by Anon on December 18, 2012
  8. homeschool

    What are the products of the double-replacement reaction between potassium chloride and silver acetate?

    asked by Lucy on December 16, 2012
  9. english

    what would be the reaction of a reader if the topic sentences in an essay did not coincide with the supporting points?

    asked by jionell on February 12, 2011
  10. Chemistry

    need help balancing the following. redox reaction in acidic solution. Clo3-+Cl->>Cl2+ClO2

    asked by chuckles on December 2, 2012
  11. Chemistry

    What is the chemical equation for the reaction of aqueous solutions of barium chloride and ammonia?

    asked by Anonymous on September 27, 2018
  12. chemistry

    What would be happening in this reaction? 2Ag^+(aq) + CO3^2-(aq) + HNO3 (aq) -----> 2AgNO3(s) + H20(l) + CO2(aq)

    asked by Abby on February 26, 2010
  13. chemistry

    If you submerge a silver teaspoon in copper sulfate solution, what reaction would you expect and why?

    asked by valentina on February 6, 2011
  14. kassie

    What is the major product of the reaction between methanol and (2R,3S)-2-bromo-3-methylpentane at room temperature?

    asked by chemistry on February 7, 2011
  15. ASD

    the reaction a + b gives c+d is studied in a one litre vessel at 250 celsius. the initial concentration ?

    asked by ASD on December 11, 2012
  16. Chemistry

    If the initial concentration of is 0.250 , and the reaction mixture initially contains no products, what are the concentrations of and after 80 ?

    asked by Anonymous on February 28, 2010
  17. reactions

    if you have 66.6g NH3 how many grams of F2 are required for a complete reaction? PLEASE SHOW ALL WORK AND/OR STEPS!!!!

    asked by Anonymous on February 7, 2010
  18. chem

    The value of ΔH° for the reaction below is -1107 kJ: 2Ba (s) + O2 (g) → 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced?

    asked by jean on March 25, 2018
  19. PRACTICAL CHEMISTRY

    REDOX balancing reaction Cr2O7 + NO-2 Cr3+ + NO3 (acid medium)

    asked by SUNDAY LEVI on November 22, 2017
  20. COLLEGE CHEMISTRY

    THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)

    asked by SHANICE on December 7, 2010
  21. chemistry

    Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the limiting reagent?

    asked by tonette on January 26, 2010
  22. Chemistry

    Use the 1/2 reaction method to balance the equation below in acidic solution. Cl2 (g) + I- (aq) = Cl- (aq) + IO3- (aq)

    asked by Kalicia on May 8, 2017
  23. Chemistry

    I need to understand, which has more effect in inducing the reaction of silver salts. Intensity or wavelength?

    asked by Jasmine on November 4, 2012
  24. science

    Calculate the energy released when 1 gram of uranium undergoes fission reaction

    asked by alphonse on May 4, 2017
  25. Chemistry

    how much energy is released during the reaction of 2.5l diboron hexahydride with 5.65l chlorine gas?

    asked by Ray on April 11, 2017
  26. Chemistry please help!

    Calculate (triangle)H for the following gas-phase reaction: 2 H-C (3dashes) C-H + 5 O=O --> 4 O=C=O = 2 H-O-H -Using bond energies

    asked by Erin on April 5, 2017
  27. Chemistry

    For the galvanic cell that uses the reaction 2 Al(s) + 3 Ni2+(aq) → 2 Al3+(aq) + 3 Ni(s) the value of n in the relationship ΔG° = -nFE° is ________.

    asked by Alex on April 4, 2017
  28. Chemistry

    For the galvanic cell that uses the reaction 2 Al(s) + 3 Ni2+(aq) → 2 Al3+(aq) + 3 Ni(s) the value of n in the relationship ΔG° = -nFE° is ________.

    asked by Hi on March 31, 2017
  29. communication

    What would be the reaction of a reader if the topic sentence in an essay did not coincide with the supporting points

    asked by mary on November 23, 2010
  30. Chemistry

    Complete and balance this equation for a combination reaction. Be + O2 ==> Would it be Be + O2 ==> BeO2 ? or... 2Be + O2 ==> 2BeO ? Why??

    asked by Jack on March 14, 2010
  31. chemiste-ry

    Consider the following equation: CO + 2 H 2 → CH 3 OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H 2 .

    asked by Anonymous on June 3, 2017
  32. science

    how to make and balance steps of reaction oF hno3 and cu by partial equation method

    asked by deeksha kushwah on June 26, 2017
  33. chemistry

    type of chemical reaction equation H3PO4+KOH=K3PO4+H2O

    asked by norma on February 23, 2010
  34. Chemistry

    write the reaction equation for the formation of CN2H2 (s) from the elements in their standard state.

    asked by Anonymous on November 10, 2017
  35. chemistry

    How many moles of ammonia gas can be produced from the reaction of 3.0L of N2 and 3.0L of H2 according to the following equation: N2(g) + 3H2(g)---> 2NH3(g)?

    asked by jerome on March 8, 2011
  36. Chemistry

    in the reaction: Cl2 + 2HBr ----> 2HCl + Br2 identify the reduced specie

    asked by Novah on November 4, 2017
  37. Chemistry

    Write a balanced equation and indicate the reaction ratio for the neutralisation of Na2CO3by HCl.

    asked by Amilia on October 23, 2017
  38. chemistry

    Predict the products of the chemical reaction aluminum + iron(III) oxide

    asked by Pedro on December 5, 2010
  39. Help

    Fibrin is produced when the blood components called what start chain reaction

    asked by Please on December 2, 2010
  40. Chemistry

    What role does a catalyst play in a chemical reaction in terms of rate and yield

    asked by Many on November 7, 2012
  41. Chemistry

    Calculate the enthalpy of reaction. D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F --> A ΔH = +303 kJ D  B --> M ΔH = -158 kJ

    asked by Josh on March 21, 2011
  42. Chemistry

    Calculate the enthalpy of reaction. D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F --> A ΔH = +303 kJ D  B --> M ΔH = -158 kJ

    asked by Josh on March 21, 2011
  43. Chemistry

    If the half life of a reaction A is 2 mins,how long will it take A to reach 25% of its initial concentration ?

    asked by Nargis on February 28, 2017
  44. chemistry

    Calculate ΔGo (in J) for 2 moles of electron(s) in each half-reaction and a standard potential of 0.44 V

    asked by moe on November 8, 2015
  45. chemistry

    Predict wheter or not the following reaction will be spontaneous, please explain Br2(l) + Cl2(l) + 29.3 kJ --> 2 BrCl(g)

    asked by Sarah on April 6, 2008
  46. Organic Chemistry

    Some 2-methyl-2-butene may be produced in the reaction as a by-product. Give a mechanism for its production.

    asked by Ariel on November 29, 2011
  47. Chemistry

    Solve with half equation reaction SO3 2- + MnO4 -=SO4 2- + Mn2+

    asked by Kabih kush on November 5, 2015
  48. Organic Chem

    Write a balanced equation showing the reaction of trimyristin and aqueous NaOH

    asked by Ruth on October 10, 2011
  49. Chemistry

    What is the net ionic equation, including phases, for the reaction of AgNO3(aq) with K2SO3(aq)

    asked by Patty on July 1, 2015
  50. CHEM

    4.69 of S is reaction with oxygen calculate the volume of SO2 in mL formed at 33 degrees C and 1.14 atm

    asked by aPRIL on June 5, 2012
  51. chemistry

    Why doesn't the hydrogen produced in the Lithium/water reaction catch fire?

    asked by Rebecca on December 15, 2007
  52. chemistry

    Write a balanced equation for the reaction of liquid bromine with chlorine gas.

    asked by annie on November 29, 2016
  53. Chemistry

    For a given reaction, the rate constant doubles when the temperature is increased from 27 o C to 49 o C. What is the activation energy?

    asked by Melissa on July 21, 2015
  54. chemistry 101

    The value of kp at 20°c for the reaction 2NO(g) + Cl2(g) 2NOCl(g) is 1.9x10^3 atm-1 calculate the value of KC at the same temperature.

    asked by Sidney on December 4, 2015
  55. chemistry

    Can thermodynamic quantity, delta G, be used to predict the speed of a reaction in a living organism? Why and why not?

    asked by nikki on October 6, 2010
  56. Chem SCC

    Complete this equation for the reaction of NaHCO3(s) + HC2H3O2(aq) ---> Include phase symbols.

    asked by Anonymous on July 15, 2012
  57. Chemistry

    Balance the reaction using half reactions under BASIC conditions: Al + CrO4^-2 ---> Al(OH)3 + Cr(OH)3 I'm not sure how to do this question.

    asked by Sara on May 19, 2015
  58. chem

    Explain clearly why changes in base concentration do not affect the observed reaction rate of an E1 elimination.

    asked by tim on October 23, 2011
  59. chm

    What is the theoretical yield of iron if we begin the reaction with 10.5g of AL (assume an excess of Fe2)3)

    asked by karol on October 21, 2011
  60. Chemistry

    Enter the Net Ionic Equation including phases, for the reaction of AgNO3 and Ba(OH)2.

    asked by Brittany on April 12, 2010
  61. Chemistry

    What would be the products of this chemical reaction?? Co(NO3)2 (aq) + NH3 (aq) = ?????? a precipitate is supposed to be formed.

    asked by Anna on October 18, 2011
  62. chem

    what substance is oxidized in following reaction 4 HCl+MnO2 and Cl2+2H2O+MnCl2

    asked by daisy on September 20, 2010
  63. chemistry

    Balance the redox reaction of eq. Cu2S + SO4(-2) gives CuO + SO2 (Acidic )

    asked by Anonymous on May 27, 2015
  64. Chem SCC

    Complete this equation for the reaction of NaHCO3(s) + HC2H3O2(aq) ---> Include phase symbols.

    asked by Anonymous on July 15, 2012
  65. Chemistry

    Write the balance equation and the reaction type when magnesium is added to HCl

    asked by John b on November 21, 2011
  66. SCIENCE

    How does temperature change during a chemical reaction. (Note: it has to be a Endothermic and exothermic reactions) Thanks

    asked by DEEZ GOT HEE on December 22, 2015
  67. chemistry

    Please help me!!! Write a balanced chemical equation for oxidation-reduction reaction of fluorene

    asked by Yusuf on January 2, 2016
  68. Chemistry

    determine the mass of titanium and iodine that react if 1.38 x 10 to the third kJ of heat emitted by the reaction

    asked by Helen on May 2, 2015
  69. chemistry

    Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the:

    asked by ray on October 1, 2015
  70. Chemistry

    The reaction rate triples when the temperature increases from 15 to 35 degree C. What is the activation energy?

    asked by Darcy on April 7, 2010
  71. Science

    Why do all salts crystals have a distinctive cubic shape? And what happens to these atoms during this chemical reaction?

    asked by Emily on February 28, 2008
  72. chemistry

    is the reaction between Copper sulfate and zn exothermic or endothermic and does that involve the activity series?

    asked by johnny on April 28, 2015
  73. chemistry

    Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?

    asked by Johnathan on April 26, 2008
  74. college chem

    How do i write the overall reaction equation for the synthesis of aluminum potassium sulphate dodecahydrate

    asked by Anonymous on June 26, 2012
  75. college chemistry

    I was wonder what bromine/glacial acetic acid solution is used for during the bromination of acetanilide reaction

    asked by Anonymous on July 17, 2013
  76. Biology

    How can you explain that Biurets reaction with amino acids as compared to other protein substances?

    asked by Tommy on November 4, 2007
  77. chemistry

    Write a balanced equation for the reaction between perchloric acid and lithium carbonate.

    asked by Samantha on April 14, 2015
  78. Science

    Why is the formation of iron hydroxide, Fe(OH)2, from Fe2+ and OH- not considered an oxidation-reduction reaction?

    asked by Nancy on March 11, 2008
  79. science

    which of the following does not affect reaction rate balancin, temperature surface area or concentration?

    asked by roland on September 27, 2011
  80. chemistry

    Fe(S)+ 2 HCl(ag) --> FeCL2(ag)+ H2(g What mass of H2 (g) is produced from the reaction of 5.2 Fe(s) with excess hydrochloric acid?

    asked by Nate on October 13, 2010
  81. chemistry

    what are the phases of all the reactants and products in the reaction 2Al + Fe2O3--->2Fe + Al2O3?

    asked by bethany on October 5, 2011
  82. chemistry

    The reaction SO2 + 1/2O2 -->SO3 has kp equal to 6.55 at 627C. what is the value of kc at this temperature? how do you set this up?

    asked by Anna on April 14, 2010
  83. communcation

    what do you think would be the reaction of a reader if the topic sentences in an essay did not align with the supporting points

    asked by lorraine bonner on November 5, 2011
  84. chemistry

    is there a chemical reaction that is used in everyday life that can go wrong? like lets say you add too much or one of the chemicals

    asked by lila on April 18, 2010
  85. science

    An equation has carbon dioxide and water as its products, what type of reaction has taken place?

    asked by billy on January 9, 2016
  86. Chemistry

    Which element is oxidized in this reaction? Fe2O3+ 3CO-(arrow)2Fe+3CO2

    asked by Rose on October 5, 2009
  87. physics

    using newtons third law explain what is meant by action and reaction pairs of forcess

    asked by Anonymous on September 29, 2011
  88. Chemistry

    Separate this redox reaction into its component half-reactions. O2 + 2Mg----> 2MgO

    asked by Brianna on July 24, 2013
  89. Writing

    I'm not sure how to edit this business letter. Please help! I'm not sure what to do when there is an address for another business? Please help edit paper! Thank you! Dear Ms. Drager: In connection with an examination of our financial statements by

    asked by Kenji on October 17, 2011
  90. Pre-Calculus

    Which is the polar form of the parametric equations x=5cos(theta) and y=5sin(theta) ? a. r= 5(theta) b. r= 5 c. r= 25 cos (theta) sin (theta)***** d. r= 25cos^2 (theta) + 25sin^2 (theta) Which is the polar form of the parametric equations x=4t and y=t^2?

    asked by Vsuf on May 22, 2018
  91. Math

    Please explain in a more simple way, what I''m supposed to do? If you are unable to submit your answer to question 1 in audio form, you may submit your answer here. What are the steps to solve this problem? 0.000027 ÷ 0.000009 Prepare your response to

    asked by BleakTuber on December 5, 2018
  92. chemistry

    are this 2 equations the same NIE? and if not how come? Write a net ionic equation for the reaction that occurs when aqueous solutions of ammonia and acetic acid are combined. Write a net ionic equation for the reaction that occurs when aqueous solutions

    asked by savannah on November 17, 2011
  93. chemsitry dr Bob

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by KYson on November 9, 2015
  94. Chemistry

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by KYson on November 9, 2015
  95. chemsitry dr Bob

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by KYson on November 9, 2015
  96. Math

    Can someone help me with this problem? A) Separate the fractions 2/6, 2/5, 6/13, 1/25, 7/8, and 9/29 into two categories: those that can be written as a terminating decimal and those of non-terminating. Write an explanation of how you made your decision.

    asked by B.B. on July 11, 2009
  97. Chemistry

    I'm having a bit of trouble translating what I see when I perform the experiment into actual chemical reactions. In one experiment, Magnesium is placed in Hydrochloric acid, and a burning splint is extinguished. So I think that it is producing Magnesium

    asked by Prasa on September 27, 2007
  98. chem expirement!

    You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose

    asked by rob on May 17, 2007
  99. Math

    What operation is used to change a fraction in simplest form to an equivalent fraction? What operation is used to change a fraction to simplest form?

    asked by Marilyn on March 15, 2011
  100. Spanish

    Please correct my work please: This is what I'm working on: Command form(imperative mood)negative familiar/polite. I have to change the following affirmative commands to the negative form. (write the word no, the object pronoun(s), and the negative command

    asked by John on May 9, 2008