1. chemistry

    In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?

    asked by josie on June 18, 2014
  2. chem


    asked by sam on September 20, 2011
  3. Chemistry

    Suppose NaOH is added to the following system when it is at equilibrium. NH3 (aq) + H2O (l) = NH4 (aq) + OH (aq) a) in which direction will the reaction shift after the NaOH is added? b) will this stress increase or decrease the value of the reaction

    asked by Anonymous on January 28, 2015
  4. chemistry

    n an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?

    asked by brittany on October 21, 2013
  5. chemistry kinetics

    The reaction SO2Cl2(g) → SO2(g) + Cl2(g) is a first order reaction carried out at constant volume at 600 K whose t1/2 is 4.1 hr. The initial pressure of SO2Cl2 is 1.25 atm. What will be the total pressure of the system after 1 hour?

    asked by swa on May 24, 2012
  6. chemistry

    Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium and cadmium: This is what I have so far: anode: In(s) --> In^3+ + 3e- cathode: Cd^2+ + 2e- --> Cd (s) Need help writing the

    asked by Lexi on April 15, 2013
  7. 11 U chemistry

    Predict the products of a reaction between solid beryllium chloride and solid potassium,write the products in a balanced chemical equation also indicate what type of reaction this is.

    asked by timothy on June 7, 2011
  8. chemistry

    when a zinc strip is placed in a copper nitrate solution, the strip becomes coated with copper. write down the oxidation half-reaction for the reaction that takes place.

    asked by Anonymous on July 27, 2010
  9. Chem 112

    Consider the following reaction: Zn (s) + 2HCl (aq) ---> ZnCl2 (g) + H2 (g) If the reaction has a 68.4% yield, how many grams of zinc are needed to obtain an actual yield of 1.00 g of zinc chloride? Stuck on how to figure this out!

    asked by Lacey on January 22, 2017
  10. chemistry

    for the reaction A + B C the concentrations of AB, and C are 0.2M, 0.4M and0.)M respectively at 0 minutes. After 30 minutes the concentrations of A and B drop to ).080mM and 0.280M respectively, while the concentration of C rises to 0.120M. Calculate the

    asked by carol on December 5, 2014
  11. chemistry

    at high temperatures, ammonia decomposes to N2 and H2. 2 NH3(g)--> N2 (g) + 3H2(g) Delta H for the reaction is positive and delta S is positive. Estimate the temperature at which this reaction becomes spontaneous

    asked by Brunette on October 6, 2012
  12. chem

    The rate data from a chemical reaction shows that doubling the concentration of A with the concentration of B remaining constant causes the rate to increase by a factor of four. What is the reaction order for [A]? a. 0 b. 0.5 c. 1 d. 2 e. 3

    asked by Anonymous on February 11, 2008
  13. Chemistry

    What are the conditions required for the following reactions to occur: 1. Addition reaction of alkenes with hydrogen halides. 2. Addition reaction of alkenes with halogens. 3. The dehydration of alcohols. Thanks.

    asked by Shym on June 7, 2007
  14. chemistry

    given the equilibrium constant for the following reaction at 500 K, 2 NO (g) + O2 (g) 2 NO2 (g) Kc = 6.2x10^5 calculate the equilibrium constant for the reaction expressed as partial pressures, Kp. the answer is 1.51x10^4. How do i get this?

    asked by alex on March 28, 2012
  15. Chemistry

    if the initial concentration of the reactant in the first order reaction A→products is 0.64 mol/L and the half-life is 30 s, calculate the concentration of reactant 120 s after initiation of the reaction

    asked by saud on November 18, 2011
  16. chemistry

    MgCO2(s)-> MgO9(s) + CO2(g) A. what is delta H reaction when 3.35 mol of CO2 react with excess MgO? B. What is delta H reaction when 305.5 g of MgCO3 decomposes.

    asked by newsome- on October 20, 2014
  17. Chemistry

    If you try to carry out a double displacement reaction by mixing together equal volumes of a solution that contains dissolved NaF and a solution that contains dissolved NaCl. Would you expect a reaction? Why or why not?

    asked by Rebecca on November 28, 2016

    The rate constant for a reaction is 4.65 L mol-1s-1. The overall order of the reaction is: zero first second third I am having trouble with the order of reactions. I don't understand this question. this is an assignment question but i have no idea how to

    asked by lucylu on September 26, 2010
  19. chemistry

    Consider the following reaction. 4Fe + 3O2=2Fe2O3 a. How many moles of O2 are required to react completely with 29.8 mg of Fe? 4.00 x 10^-4 moles O2 b. How many grams Fe2O3, are produced from the complete reaction of 17.8 g of Fe? 25.4 g Fe2O3

    asked by krystal on February 15, 2012
  20. Chemistry

    For the reaction Al(s) + 3 HCl(aq)->AlCl3(s) +3/2 H2(g) it was observed that when 4.00g of aluminum reacted with excess HCl, exactly 30,0 kJ of heat was released. What is the delta H for this reaction? I do not understand how to get the delta H value.

    asked by Hannah on January 22, 2012
  21. maths/probability

    q/ in a soccer match where team a has form figures of W/2 D/1 L/7 and team b has form figures of W/3 D/4 L/3 whatis the likely outcome of the match percentage wise for team a W/ L/ D/ ? if team a has form figures of W/2 D/1 L/7 and team b W/3 D4 L/3 you

    asked by james on August 3, 2007
  22. Algebra

    Rewrite into standard form (0,5), m=-3/5. Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (2,-3) and (2,4)

    asked by Becky on December 9, 2007
  23. English

    1. He often takes pictures of sunrises/sunrise. (Do we have to use the singular form or the plural form?) 2. What's wrong with your brother? - No, not at all. (Is this answer suitable? Do you have other suitable answers?)

    asked by rfvv on June 20, 2016
  24. French

    Which form of conjugation would I use for the following? Like would I use the tu, vous, nous, il, elle, etc. form for which one? -Les enfants -Ma famille -Les adultes -Ces fruits coupes Thanks

    asked by Erika on June 7, 2011
  25. chemistry

    The body-centered cubic unit cell of a particular crystalline form of silver is 2.2887A on each side. Calculate the density of this form of silver?

    asked by Ericka on December 11, 2009
  26. Science

    For example HNO2 + H20 ----> H30+ NO2- I don't understand how the hydronium ions form. How do I figure out if a OH- or H30+ will form from the reactant side.

    asked by Jeff on July 30, 2013
  27. scientific notations

    Explain how to convert seven point one three times ten to the eleventh from scientific notation to standard form, then give the answer in standard form.

    asked by none ya on January 18, 2012
  28. Spanish

    Write the correct form of ser. Tu y tus padres________________de Puerto Rico? Which is the correct form? 'son' or 'sois' and why? Muchas Gracias

    asked by Larry on February 9, 2009
  29. algebra

    Rewrite into standard form (0,5), m=-3/5. Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (2,-3) and (2,4)

    asked by anonymous on December 9, 2007
  30. Algebra

    Write an equation in standard form (slope-intecept form) of the line passing through the pair of points (3,4) and (5,8) containing point (5,9) and parallel to the line.

    asked by Jay on May 1, 2012
  31. algebra

    solve the exponential equation Express in exact form. 5e^xlog_9 = 11 Is x = (ln11-ln5/log_9 exact form??????

    asked by anon on December 18, 2011
  32. Maths

    Convert the complex no. In polar form : 1-i rcosΘ =1 rsinΘ=-1 r=√a2+b2 r=√(1)2+(-1)2 r=√2 TanΘ=b/a =1/-1 =-1 After all this what i have to do to find out value of Θ? Please help me.. For polar form, =r(cosΘ+isinΘ)

    asked by Ash on June 20, 2017
  33. English

    The homework is asking for the Present Tense, Past Tense, Active Form, Noun & Adjective Form for the word Accomplish.

    asked by Rowan on September 14, 2009
  34. Algebra

    Okay, so! I figured out how to get the Point-slope form to the question I was given which led me to y+3 =-2(x+1), but, now I'm stick on finding the Slope Intercept form to get my answer. Can someone help me? Thanks!

    asked by Fiona on September 15, 2014
  35. algebra

    Hello, I need help with this problem use point slope form to find the equation of the line with given properties write equation in given form m=-7 passing through (3,0) = 21

    asked by devon on January 21, 2010
  36. LA check work

    Hello could you check my work on these two questions? Question one: How do you form the perfect tense of a verb? A. use the helping verb will and the base form of the verb B. use a form of the verb have and the present particle of the verb C. use a form of

    asked by kevin on November 3, 2015
  37. chemistry

    2. What is the percent yield of Mg3N2 if 73.9 g of Mg reacts with 31.6 g of N2 to produce 79 g of Mg3N2 according to the following chemical reaction? (Reaction may or may not be balanced.) mg+n2=Mg3N2

    asked by brittany on November 26, 2013
  38. Chemistry 1

    Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 215 cal/g. The scientist observing the

    asked by Molly on January 24, 2014
  39. chem. question?+asap!!!!!

    For the reaction, state if the reaction is quantitative, or, if not, state whether products or reactants are favoured at equilibrium. 1. 100 mL of 0.1 mol/L nitric acid reacts with 100 mL of 0.1 mol/L ammonium hydrogen carbonate My question is how do I

    asked by say what? on June 17, 2006
  40. chemistry

    2AgNO3 + Zn -> 2Ag + Zn(NO3)2 Put Zn 19g and excessive amount of AgNO3 together in a beaker and start reaction. When Zn is still in a beaker, stop the reaction, and measure the mess of (Zn+Ag). Mass of (Zn+Ag) was 29g. Than what is the mass of Ag in

    asked by Rov. on April 24, 2018
  41. chemistry

    5.00g aluminum sulfide and 10.0g water react according to the reaction: Al2S3 + 6 H2O -> 2 Al(OH)3 + 3 H2S What is maximum mass of H2S that can be formed? What mass of excess reactant remains when the reaction is complete?

    asked by Jessi on October 12, 2014
  42. Chemistry

    It's a molar heat reaction lab. 0.07g Mg Mg+2HCl->MgCl2+H2 What is the actual value for the heat of reaction based on the enthalpy's of formation? HfHCl= -118.53 kJ/mole HfMgCl2= -774 kJ/mole

    asked by Nina on May 16, 2012

    When NH3 is added to solid Hg2Cl2, some of the mercury ions are oxidized and some are reduced. A reaction where the same substance is both oxidized and reduced is called a disproportionation reaction. Write equations for each of these half-reactions. HELP

    asked by Colin on April 9, 2013
  44. chemistry

    In a study of the alcohol dehydrogenase catalysed oxidation of of ethanol at 25.0 C, the molar concentration of ethanol decreased in a first-order reaction from 220.0 mmol/L to 56.0 mmol/L in 1.22 x 104s. What is the rate constant of the reaction at 25.0

    asked by gina on March 11, 2009
  45. chem

    Calculate the standard enthalpy change for the reaction 2A+B->2C+D Use the following data: Substance A=-257kj/mol B=-413kj/mol C=189kj/mol D=-475kj/mol For the reaction given , how much heat is absorbed when 3.00mol of A react?

    asked by tomi on October 8, 2008
  46. Chemistry

    You are staying the reaction A2 (g)+B2 (g)=2AB (g) To determine its rate law .Assuming that you have a valid experimental procedure for obtaining (A2)& (B2) at various times, explain how you determine (a)the initial, (b) the reaction order, & (c) the rate

    asked by Munavvar on February 28, 2015
  47. Chemistry!!!!

    A student mixed 50.0 mL of 0.50 M H2SO4 (aq) at 18.5 degrees C with 100 mL of 0.50 M NaOH (aq) at the same temperature. After the reaction was completed, the temperature rose to 22.0 degrees C. What was the heat of reaction? (Assuming the densities of the

    asked by Anonymous on May 25, 2010
  48. Chemsitry

    Consider the equilibrium A(g)=2B(g)+3C(g) at 25 degrees Celsius. When A is loaded into a cylinder at 10 atm and the system is allowed to come to equilibrium, the final pressure is found to be 12.13 atm. What is the standard gibbs free energy of reaction

    asked by Anonymous on January 31, 2014
  49. Chemistry

    A precipitation reaction takes place when a water solution of potassium phosphate, K3PO4, is added to a water solution of cobalt (II) chloride, CoCl2 Write a balanced equation for this reaction

    asked by Marissa on November 16, 2016
  50. science

    Potassium iodide is prepared by the reaction of hydroiodic acid and potassium hydrogen carbonate. water and carbon dioxide are also produced. in the reaction of 398 g HI and 318 g KHCO3, how many grams of KI are produced?

    asked by A. on January 5, 2010
  51. combusion -science

    the reaction order with respect to C4H10 =.15 and the reaction order with respect to O=1.6 , the pre exponential factor =4.16.10^9 . the activation energy =125000 kl/kaul. write out an expression for the rate of butane destruction

    asked by linda on December 10, 2012
  52. Chemistry

    (a) Propylene, H2C=CH-CH3, can be reacted to form a polymer known as polypropylene (PP). What type of polymerization reaction is most appropriate for the formation of polypropylene? i)Addition Polymerization ii)Anionic Polymerization iii)Condensation

    asked by Chemgam on January 11, 2013
  53. English

    1.All of the balloons on the string (popped) except two. 2.Do you (want) to buy those books? 3.Daniel's dog is (following) the trail to the river's edge. 4.For thirty years the noon whistle has (blown) exactly on time. 5.The players have (challenged) their

    asked by Hayley on January 28, 2011
  54. Spanish (Please Help)

    1. Write the verb form for: yo/hacer. 2. Write the verb form for: ellos/hacer. 3. Write the verb form for: nosotros/hacer. I'm not sure, but I think these are the answers: 1.) Hago 2.) Hagan 3.) Hagamos Thnk You.

    asked by Brendon on January 24, 2013
  55. chemistry

    Based on reaction kinetics, which of the following pairs of reactions and reaction rate equations represent elementary reactions? You may choose more than one reaction. Ti + 2Cl2 = TiCl4 Rate = k[Ti][Cl2] 2SO2 + O2 = 2SO3 Rate = k[O2][SO2]2 Na2S + CuSO4 =

    asked by danny on February 15, 2015
  56. biology

    The conversion of molecule S to product P has a Keq = 2.0. Two different, but related enzymes, A and B, can catalyze the reaction. The product P serves as an allosteric inhibitor of enzyme B, but not of enzyme A. A. 10 mM S is placed into three separate

    asked by jay on October 15, 2007
  57. Analytic Geometry/Calculus

    We didn't go over the perpendicular form in class, only the parallel. Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line.

    asked by Arya on April 8, 2013
  58. Mat 117

    •I am having trouble figuring out this question. Why is (3x + 5) (x - 2) + (2x - 3) (x - 2) not in factored form? Show specifically how to find the correct final factored form. What is this factoring method called? Please help. Thank you.

    asked by G on May 23, 2011
  59. math

    1. the speed of light is 8.0x^8m/s in standard form that is? 2. the average size of a virus is 2x 10^-10 nanometers in diameter. how to write the number(s) given scientific notation in standard form. thank you

    asked by melves on May 21, 2013
  60. math

    A cat can walk 2,190 miles in 2 hours. How can 2,190/2 be written in expanded form? 1) 2,000+100+90/2 2)200+90+1/2 Write it in quotation form.

    asked by ray on January 5, 2016
  61. chemistry

    Liquid Nitrogen tetroxide, N2O4(l), was used as a fuel in Apollo missions to the moon. In a closed container the gas N2O4(g) decomposes to nitrogen dioxide, NO2(g). The equilibrium constant,k, for this reaction is 0.87 at 55 degrees Celsius. A vessel

    asked by Claus on April 3, 2008
  62. Chemistry

    Reaction of gaseous fluorine with compound x yields a single product y, whose mass percent composition is 61.7% F and 38.3%Cl. (a) What is a probable molecular formula for product Y, and what is a probable molecular formula for X? (b) Draw an electron-dot

    asked by Malan on December 26, 2015
  63. chemistry

    Calculate [Fe^2]+ when the cell reaction reaches equilibrium? A voltaic cell is constructed based on the following reaction and initial concentrations: Fe^2+,( 0.0050 M ) + Ag+,( 2.5 M ) ----> Fe^3+,( 0.0050 M ) + Ag(s)

    asked by HELP!!! on March 29, 2009
  64. Chemistry

    what is the limiting reagent in these two reactions Reaction 1: CuSO4+2NaOH=Cuo+Na2SO4+H2O Reaction 2: CuSO4+NaCO3=CuCO3+Na2SO4

    asked by ryan on October 22, 2014
  65. chemistry

    At 25 °C, the equilibrium partial pressures for the following reaction were found to be PA = 6.30 atm, PB = 7.20 atm, PC = 6.40 atm, and PD = 9.10 atm. 2A(g) + 2B(g)-->C(g) + 3D(g) What is the standard change in Gibbs free energy of this reaction at 25

    asked by Katie on February 17, 2012
  66. chemistry

    nitrosyl bromide, NOBr is formed from NO and Br2-. Experiments show that this reaction is second order in NO and first order in Br2. what is the rate equation for this reaction?

    asked by JOJO on September 3, 2014
  67. organic chemistry

    what product is formed from 1-bromo-2 methyl-cyclohexane reaction with CH3ONa and CH3OH...from a substitution reaction ...I got 1-CH3OH-2methly-cyclohexane but it's wrong. Not sure how to do it

    asked by Yoo on January 19, 2011
  68. chemistry

    Write an equilibrium constant expression for the chemical reaction of ammonia with water. (In this reaction assume that the concentration of water will remain constant)

    asked by Locke on June 13, 2010
  69. Chemistry

    Hi I need help with finding the Reduction Half reaction and Oxidation Half Reaction for this: copper(II) acetate reacts with water Cu(C2H3O2)2 . H20 --> Cu^(2+) (aq) + 2(C2H3O2)^(1-)

    asked by Anonymous on May 13, 2010
  70. Chemistry check my answer?

    Hi! is my answer correct? Consider the following chemical reaction: H2 (g) + I2 (g) 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. The value ofKeq for this reaction is

    asked by Richard on October 26, 2010
  71. physics 30

    Given the reaction 3 NO2(g) + H2O(l) ¨ 2 HNO3(l) + NO(g) ƒ¢rH = -72.0 kJ, calculate the molar enthalpy of reaction, rH for: 1) NO2(g) 2) H20 (l) 3) HNO3 (l) 4) NO (g) Express you answer in Kj/mol

    asked by ?????halp on February 10, 2015
  72. Science

    Why do reaction times(reflexes) differ from person to person? Wny does your reaction time improve when the same thing is done over and over again. ( slap in face 10 times)

    asked by chris on June 9, 2009
  73. College Chemistry

    a)What is the theoretical yield for this reaction under the given conditions? b)What is the percent yield for this reaction under the given conditions? 1.41gH2 is allowed to react with 10.4gN2,producing 2.46gNH3

    asked by Alex on September 19, 2010
  74. Science

    Why do reaction times(reflexes) differ from person to person? Wny does your reaction time improve when the same thing is done over and over again. ( slap in face 10 times)

    asked by Anonymous on June 9, 2009
  75. Chemistry

    Put the following in order, from the one with the greatest impact on reaction rate to the one with the least impact on reaction rate: temperature, amounts of reactant, and presence of catalyst.

    asked by Anonymous on May 23, 2016
  76. Thermo

    In an isothermal reaction (either reversible or irreversible), DELTA T is constant..hence zero since temperature remains constant, can we also assume that heat is also zero? if so, how then is an isothermal reaction different from an Adiabatic one?

    asked by Kim P on March 12, 2010
  77. chemistry

    Balance the following chemical reaction and determine the number of moles of HI produced when 2.33 moles of H2(g) are consumed in the following chemical reaction: ___H2(g) + __I2(g) -> ___HI (g)

    asked by anon on February 19, 2017
  78. Chemistry

    The oxidation of sulfur dioxide to sulfur trioxide is an important reaction. At 1000K, the value of Kc is 3.6 x 10^-3. What is [SO3] at equilibrium when the reaction vessel is maintained at 1000K.

    asked by Jenny on June 16, 2011
  79. chemistry

    A certain voltaic cell has a standard cell voltage of 1.22 V, and 3 electrons are transferred in the overall cell reaction. What is the value of the thermodynamic equilibrium constant for this cell reaction at 298K?

    asked by will on March 15, 2011
  80. chemistry

    According to the following reaction, how many grams of zinc hydroxide will be formed upon the complete reaction of 29.8 grams of water with excess zinc oxide? ZnO (s) + H2O (l) Zn(OH)2 (aq)

    asked by Anonymous on April 1, 2012
  81. Chemistry Check

    Just want to make sure that my thought process is right on this one. 5 compounds: n-butyl chloride n-butyl bromide sec-butyl chloride tert-butyl chloride and crotyl chloride Each is reacted with NaI (SN2?) and AgNO3 (SN1?) And we have to rank the reaction

    asked by ramire2 on November 8, 2013
  82. chemistry

    Reaction 1: Cu (strongest reducing agent) I- Ag Br- (weakest reducing agent) Reaction 2: Zn(strongestreducing agent) Pb Cu Ag(weakest reducing agent) Reaction 3: Cl2 (strongest oxidizing agent) Br2 I2 (wekest oxidizing agent) Using these results, how am I

    asked by Anna on April 15, 2008
  83. Calculas

    Write the equation for a line in point slope form and in slope intercept form parallel to 3x-4y=12 and passes through (8,3).

    asked by Edgar Martinez on August 8, 2016
  84. computer science

    In form view you can view a forms records but cannot change the layout or design of the form true or false

    asked by Anonymous on September 27, 2013
  85. Pre-Cal

    Find the component form of v given its magnitude and the anlge it makes with the positive a-axis. v=3 v in the direction 3i + 4J Would the component form be (3,4)?

    asked by Hannah on March 28, 2010
  86. math

    write the equation for a line in point-slope form and in slope-intercept form. parallel to 3x-4y=12 and passes through (8,3).

    asked by nancy on August 16, 2009
  87. Parabola

    How do I put this parabola in standard form? Could someone show how they would put it in this form: (x - h)2 = 4p(y - k) 1. 4x^2+24x+128y-988=0 Please help! I'm lost.

    asked by Kate on May 25, 2012
  88. pre-calculus

    convert the numbers to polar form and then divide.leave the answer in polar form. 10-10i/3root3+3i

    asked by javed on December 3, 2008
  89. trigonometry

    1)Solve and write in standard form: 4x^2-4x+21=0 2)Find the standard form of the complex number. 8(cos pi/2 + i sin pi/2) Thanks everyone!

    asked by mikey on December 4, 2012
  90. Math Algr.2

    Convert to standard form (AX+BY=C) 1.y=3/2x+6 2. 2/3y=2x-5 3.7y-21=1/2x 4.-2/3x+3/4y=1 Convert to Slope/intercept form (y=mx+b) 1.3x-27=14 2.-9y-6x-18=0 3.8-2x+4y=0 12x=4y-8 I need help going through this because I am not sure if I am doing everything

    asked by Hannah on November 6, 2012
  91. 3rd grade math

    what is standard form ? and What is expanded form ?

    asked by brianna on August 17, 2011
  92. Chemistry

    The homework question is : Calculate the Delta H for the following reaction: C6H6 + O2 -> C + H2O(l) State whether the reaction is exothermic or endothermic. I'm not sure where to go with this but so far I balanced out the formula to this C6H6 + (3/2)O2 ->

    asked by Alexa on December 2, 2014
  93. chemistry

    5. Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless heater. The heat is produced by the following reaction: Mg(s) + 2H2O(l) --> Mg(OH)2(s) + H2(g) Calculate the number of grams of Mg needed for this reaction to release enough

    asked by tra on May 14, 2013
  94. Chemistry

    What volume of gas can be produced in a lab where pressure is 16.0 psi and temperature is 25 C if you collect it over water from the reaction of 50g of ammonium sulfate with 50g of aluminum hydroxide. The equation for the reaction is: 3(NH4)2SO4 + 2Al(OH)3

    asked by Victor on April 7, 2017
  95. Chemistry

    I am not sure about this question I tried a) but am very confused with b. Experiments were preformed with four metals and solutions of their ions: A- A+, B-B2+, C-C2+, D-D2+. The results of the experiment were: D2+ + C --> No reaction B2+ + C --> B + C2+

    asked by Lynn on March 19, 2010
  96. chemistry

    The given reaction, cyclopropane propene (isomerization), follows first-order kinetics. The half-live was found to be 4.57 min at 796 K and rate constant was found to be 0.0328 s-1 at 850 K. Calculate the activation energy (in kJ/mol) for this reaction.

    asked by bobjahng2 on November 23, 2010
  97. chemistry

    write a balanced chemical equation for calcium nitate plus sulfuric acid produces calcium sulphate and ? This is a metathetical reaction, I think more properly called a double displacement reaction now. Just change + and - partners. Ca(NO3)2 + H2SO4 ==>

    asked by walter on August 9, 2007
  98. physics-please check

    is this right?: when a form of energy changes from one form to another some energy may transfrm into a useful form, those useful form of energy is high grade energy.while the rest of the energy will always change to form we cannot use.which is called the

    asked by Emma on May 14, 2007
  99. chemistry

    The activation energy for the reaction in which CO2 decomposes to CO and a free radical oxygen atom, O, has activation energy of 460 kJ mol^-2. The frequency factor is 2 x 1011 s^-1. What is the rate constant for this reaction at 298 K?

    asked by Massiel on March 20, 2011
  100. Chemistry-Please help

    2C8H18(g)+25O2(g)-->16CO2(g)+18H2O(g) 0.290mol of octane is allowed to react with 0.600mol of oxygen.The limiting reactant is Oxygen. How many moles of water are produced in this reaction? After the reaction, how much octane is left?

    asked by Rose on October 6, 2009