1. AP Chemistry

    C2H2(g) + 2H2(g) --> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following table: C2H2(g) 226.7 kj/mol C2H6(g) -84.7 kj/mol [the values are the change in enthalpy] a. write the equation for
  2. physics

    a typical automobile has a maximum deceleration of about 7m/s2, the typical reaction time to engage the brakes is 0.50s. A school board sets the speed limit in a school zone to meet the condition that all cars should be able to stop in a distance of 4 m.
  3. Chemistry

    The reaction Co(H2O)6^+2 + 4Cl- <==> CoCl^-2 + 6H2O is at equilibrium. The right side is pink and the left side is blue. 1. What would happen if you added AgNO3? Would nothing happen? Or would the Ag+ react with the Cl- and shift the reaction left?
  4. Chemistry

    This has to do with the reactivity series for metals (K,Na,Ca,Mg,Al,Zn,Fe,Pb,Cu,Au,Ag) Which metal is most likely to undergo the conversion M(s)->M(n+)(aq)+ne- What type of reaction is this?-oxidation ? Which metal ion is most likely to undergo the
  5. AP Physics

    To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 82.5 km/h,
  6. Chemistry

    The reaction Co(H2O)6^+2 + 4Cl- <==> CoCl^-2 + 6H2O is at equilibrium. The left side is pink and the right side is blue. 1. What would happen if you added AgNO3? Would nothing happen? Or would the Ag+ react with the Cl- and shift the reaction left?
  7. Chemistry

    For the reaction: V2O5 + 6HCl --> 2VOCl3 + 3H2O If 13.65g of VOCl3 was produced in this reaction, how many grams of V2O5 were reacted in excess HCl? I used stoichiometry and converted 13.65g of VOCl3 into grams of V2O5. I got 73.28 g. However, I feel
  8. chemistry

    for the chemical reaction A+B= C+D, the following experimental data were taken to determine the ratelaw equation at 300K. determine the rate law for the chemical reaction. fromthe experiment data i found out the exponetial value... but 300k part confuses
  9. chemistry

    Hydrogen peroxide can be produced in the lab by reacting barium peroxide with hydrochloric acid. another product of the reaction is barium chloride. 1). what is the balanced chemical equation for the reaction? 2). what mass of hydrogen peroxide should
  10. Chemistry

    Help please!!! Complete the two reduction half reactions for the cell shown at the right, and show the line notation for the cell by dragging labels to the correct position. (The electrode on the left is the anode, and the one on the right is the cathode.)
  11. chem help

    The reaction of methane and oxygen yields carbon dioxide gas and water. The unbalanced reaction is as follows: CH4(g) + O2(g)CO2(g) + H2O(g) A. If 1.26 grams of methane are reacted, how many grams of water vapor are produced? B. If 2.796 grams CO2 are
  12. chemistry

    1 gram of C3H8 gas and 1 gram of O2 gas are delivered to a metal sphere with a fixed volume of 1 L. After the two gases are introduced, the two reactants are ignited and burned according to the balanced reaction C3H8(g)+5O2(g)changes to3CO2(g)+4H2O(g)
  13. chemistry

    1 gram of C3H8 gas and 1 gram of O2 gas are delivered to a metal sphere with a fixed volume of 1 L. After the two gases are introduced, the two reactants are ignited and burned according to the balanced reaction: C3H8(g)+5O2(g)changes to 3CO2(g)+4H2O(g)
  14. CHEM

    My balanced equation is: a) 2C8H18(g) + 25O2(g) -> 16CO2(g) + 18H2O(g) b) 0.290 mol of octane is allowed to react with 0.670mol of oxygen. Which is the limiting reactant? (((Which I found Oxygen to be the limiting reactant.))) I do not understant how to
  15. Chemistry

    If I was designing an experiment where hydrogen gas was collected over a 0.1 M aqueous HCl solution from the reaction with zinc metal and I assume complete, rapid reaction, what mass of zinc would be used to collect between 50 and 100 mL of the gas? Note:
  16. CHEMISTRY

    I need help with these problems ASAP: I need help setting these problems up: pleas!! (1)Calculate the volume of 1.87 M NaI that would be needed to precipitate all of the Hg+2 ion from 199 mL of a 1.96 M Hg(NO3)2. The equation for the reaction is 2NaI (aq)
  17. Geomertry

    Points c,a,b are connected to form a triangle along the surface of a sphere. Points R,E,N are connected to form a triangle on a euclidean. What is true between spherical and euclidean geometry?
  18. Chemistry

    A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?
  19. Geomertry

    Points c,a,b are connected to form a triangle along the surface of a sphere. Points R,E,N are connected to form a triangle on a euclidean. What is true between spherical and euclidean geometry?
  20. math

    I have no idea how to do this: Express the ratio in simplest form. 5 yards to 24 feet convert yards to feet: 12 x 5 = 60 ft. Would the answer be 60:24 ? is this the simplest form if the answer is correct?
  21. English

    1. We can use less water when we do the dishes. 2. We can use less water when we are doing the dishes. 3. We can use only a little water when we wash a car. 4. We can use only a little water when we are washing a car. ===================== Are they all
  22. complex number help

    plz help find the fourth root of -16,giving the result in form of a+jb and also 5th root of -1,giving the result in polar form plz help thanks
  23. college algebra

    find the complex zeros of the polynomial function. write f in factored form. use complex zeros to write f in factored form f(x)= x^3-6x^2+21x-26
  24. Math exponents

    Please explain how to get the prime factorization in exponent form as in example the number 24. What would be the exponent form? Thx, J The factors are 2 and 3. The prime factorization of 24 is (2^3)*3 We would say that 2 has order 3 and 3 has order 1.
  25. Chemistry

    The experiment that I did in lab consisted of performing a qualitative analysis of group 1 and 2 cations and anions. The first thing that I did was to add 5 drops of 3M HCl, centrifuge it, and to observe whether a precipitate would form. It did and in the
  26. Spanish

    I have two questions about translation. If asked this question, how do I answer it. Cual es tu numero de telefono? I know it is asking my phone number which is 447-7161 but I don't know how to put it in sentence form. The next question is Que te gusta
  27. Chemistry

    Please also, help me set up this problem. Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g)+2H2(g)⇌C2H6(g). Given the following data at standard conditions (all pressures equal to 1 atm
  28. Math

    Describe and correct the error in writing the number 81,700,000 in scientific notation. Standard form 81,700,000 product form 81.7*100,000 scientific notation 81.7*10
  29. French

    I am stumped on these two questions. Unscramble the following words tp make sentences. Be sure to use the correct form of avoir. 1. j'/ordinateur/un/avoir 2. de/n'/vous/avoir/pas/chaise I know what the words mean but im not quite sure of the correct form
  30. Chemistry

    The specific heat of a solution is X J/g*degreesC and its density is Y g/mL. The solution was formed by combining Z mL of solution A with Z mL of solution B, with each solution initially at J degreesC. The final temperature of the combined solutions is D.
  31. Spanish: check answers

    Questions: 3. Paella is a dish like tacos. a dish made of rice, seafood, and vegetables eaten in Spain. another name for enchiladas. 4. Fast-food restaurants in the Spanish-speaking world are generally very popular with adults. look similar to the ones in
  32. Health

    A swimmer would like to improve his time in the 100 yard freestyle race. After talking to his coach, he intends to focus on one critical element at the beginning of the race. This swimmer will try to improve his 100 yard freestyle time by improving his (1
  33. chemistry

    What will happen in this reaction: NH3 + H2 = NH4 when x amount of NH4 is added, equilibrium is reached, then 2x is removed. to the product side because the amount taken out is greater than amount that is added? if amount added is x and amount removed is
  34. Chemistry

    Someone said, "Calculate the total delta H of the reaction and subtract the total delta H of the product from it. If you get a positive value, it radiates heat which means it's exothermic. If it is negative, heat is needed to get a reaction so it is
  35. Chemistry

    Someone said, "Calculate the total delta H of the reaction and subtract the total delta H of the product from it. If you get a positive value, it radiates heat which means it's exothermic. If it is negative, heat is needed to get a reaction so it is
  36. Chemistry ,Reactions at Electrodes during Electrol

    Reactions at Electrodes during Electrolysis Which half-reaction will take place at the cathode during the electrolysis of molten MgCl2? 2Cl- > Cl2 + 2e- Cl2 + 2e- > 2Cl- Mg2+ + 2e- > Mg Mg > Mg2+ + 2e- Which half-reaction will take place at the
  37. chemistry

    the reaction of methane and water is one way to prepare hydrogen for use as a fuel: methanw react with water to from carbonmonoxide and hydrogen if you begin with 995g of methane and 2510g of water, 1.which reactant is the limiting reactant? 2.what is the
  38. PLEASE HELP CHEM!

    2 HgCl2 (aq) + SnCl2 (aq) --> SnCl4 (aq) + Hg2Cl2 (s) Hg2Cl2 (aq) + SnCl2 (aq) --> 2Hg (s) + SnCl4 (aq) For each reaction, write the two half-reactions that make it up and calculate the overall reaction potential by adding the two half-reactions.
  39. Biochem

    Glycerol 3-phosphate dehydrogenase catalyzes the reversible reaction: G3P + NAD+ --> NADH + H+ + DHAP If in the cell, the concentrations of G3P, NAD+, NADH, and DHAP are 2 mM, 4 mM, 6 mM, and 8 mM respectively. Determine if the reaction spontaneous as
  40. Chemistry

    IS THIS RIGHT? Experiments were performed with four metals and solutions of their ions: A-A^+, B-B^2+, C-C^2+, D-D^2+. The results of the experiments were: D^+2 + C ---> No reaction B^+2 + C---> B + C^+2 A^+ + B ---> A + B^+2 a.) Write the
  41. PRECALCULUS

    1.) determine two pairs of polar coordinates for the point (-4sqrt3, 4sqrt3)with 0degrees less than or equal to theta less than or equal to 360degrees 2.) Use DeMoivre's Theorem to find (1-i)^10. write your answer in the form a+bi. 3.) Find the cube roots
  42. Math

    a. For the first company, express in words the amount the cab company charges per ride and per mile. Charges per ride $3.00 per mile $0.50 b. Write an equation in slope-intercept, point-slope, or standard form. Explain why you chose the form you did. Don't
  43. ela

    The poems are concrete cat haiku and limerick in the poems you read in collection 3 the poets choose different forms to express their thoughts and feelings about the subject. Imagine That there poetic forms changed. How would each poem be different if its
  44. Chemistry

    Calculate the concentrations of S2O8 2-, I-, S2O32 2- in moles per litre of reaction mixture given the following: 20mL of 0.1 M (NH4)2S2O8 added to: 20mL of 0.2M KI 10mL of 0.01M Na2S2O3 5mL 0.2% starch Also, calculate -(delta)S2O8 2- that is, how much
  45. chemistry

    Calculate the change in entropy (ΔS˚) of reaction (J/K) for the equation as written. BaCO3(s) → BaO(s) + CO2(g) Table: S° (J/(K mol)) BaCO3(s) = 112 BaO(s) = 70.3 CO2(g) = 213.7 So the answer is -41.7 I thought to find the entropy of
  46. Chemisty

    Fluorine gas can react with ammonia gas to produce dinitrogen tetrafluoride gas and hydrogen fluoride gas. This reaction is described by the following balanced equation: 5 F2 (g) + 2 NH3 (g) N2F4 (g) + 6 HF (g) What mass of hydrogen fluoride gas is
  47. AP Chemistry

    in a coffee-cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M of HCl are mixed to yield the following reaction: Ag+ (aq) + Cl- (aq) >> AgCl (s) the two solutions were initially at 22.60 degree celsius, and the final temperature is
  48. AP Chemistry

    in a coffee-cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M of HCl are mixed to yield the following reaction: Ag+ (aq) + Cl- (aq) >> AgCl (s) the two solutions were initially at 22.60 degree celsius, and the final temperature is
  49. chemistry

    A reaction proceeds by the following three-step mechanism with elementary rate coefficients, k. A + B → C k 1 C → A + B k -1 C → B + D k 2 (C is a chemical radical) (ii) By applying the Steady State Approximation determine the overall
  50. Chemistry

    Which of the following is NOT true for ΔGrxn? A.) If ΔG°rxn > 0, the reaction is spontaneous in the forward direction. B.) If Q = 1, then ΔGrxn = ΔG°rxn.If ΔG°rxn = 0, the reaction is spontaneous in the reverse direction. C.)
  51. Chemistry

    The ionization constant Ka of an indicator HIn is 1.0x10^-6. The color of the nonionized form is red and that of the ionized form is yellow. What is the color of this indicator in a solution whose pH is 4.00? (The question mentions that you can use the
  52. College Chemistry

    For the reaction SO3(g)---> SO2(g) + 1/2 O2(g), Kc= 16.7 at 1000 K. What is the value of Kc at 1000 K for the reaction 2 SO2 (g) + O2(g)---> 2 SO3(g)?
  53. Pre-Calculus

    Please check my answer: I think it's correct? 1.Find polar form of (-3,2) r=sqrt of (-3)^2 + 2^2)=sqrt (13) = 3.61 tan^-1(2/-3) = 33.79 180-33.79 = 146.31degrees polar points are (sqrt13,146.31degrees) 2. Rectangular form of (3,112degrees) 3cos112= (-1.12)
  54. chemistry

    1 liter of a 1 M lithium hydroxide solution is added to 1 liter of a 1 M barium chloride solution, and a precipitate forms. What ions are left in solution after the reaction is complete? What ions are left in solution after the reaction is complete?
  55. Chemistry

    Rxn 1:     4 NH3(g) + 5 O2(g) ⇌ 4 NO(g) + 6 H2O(g)         If the equilibrium constant, Kc, for Rxn 1 is 0.0015, determine the equilibrium constant, Kc, for the    reaction:   2 NH3(g) + 5/2 O2(g) ⇌ 2 NO(g) + 3 H2O(g) I'm not sure how
  56. Chemistry

    I did a lab where we had to determine the iron content in ore...i am confused about the reactions that occured during the reaction...i need reactions for the following... 1) The samples were treated with 6M HCl until all the iron ore dissolved.Assuming all
  57. PHI 103

    PHI 103 Symbolic Logic- write 2 argument in English,one in the form of modus ponens and one in the form of modus tollens.Then write the argument in symbols using sentences letters and truth-functional connectives.
  58. Calculus

    A wire 17 inches long is cut into two pieces. One piece is bent to form a square and the other is bent to form a rectangle that is twice as wide as it is high. How should the wire be cut in order to minimize the total area of the square and rectangle?
  59. Chem 1010

    Aqueous solutions of sodium sulfide and silver nitrate are mixed to form solid silver sulfide and aqueous sodium nitrate. The complete ionic equation contains which one of the following terms (when balanced in standard form)?
  60. Chemistry Lab

    Are you titrating? Qualitative testing? Just what? If the copper is in solution you can filter the ppt (or let the ppt settle and decant some of the supernatant liquid) and to the filtrate or the decanted liquid add some more NaOH to see if additional ppt
  61. chemistry

    Referring to the following reaction: Pb(NO3)2 (aq) + Na2SO4 (aq) -->PbSO4 (s) + 2NaNO3 (aq) A solution of 0.114 M Pb(NO3)2 with a volume 10.6 mL is added to 12.4 mL of a solution of 0.105 M Na2SO4. Calculate the number of grams of PbSO4 that will form.
  62. chemistry

    3A+2B+2C > 4D+2E 1) what is the rate of this reaction in terms of change of concentration of reactant B? - is it '1/2' ? 2) what is the rate of this reaction in terms of change of concentration of product D? please help
  63. Math

    Need Answer to the Following Please: Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four different digits to form a four-digit number that is NOT divisible by 7. The digits 1238 cannot be arranged to create a four-digit number that is
  64. Math

    Use the point-slope form linear equation given to complete the following problems. y-3=3(x+1) 1. What is the slope of the given line? Here's what I did: y-3=3(x+1) y-3+3=3x+3 y=3x+6 m=3 Correct so far? 2. What point does this line pass through, which is
  65. Chemistry

    Cu(s) | Cu2+(0.10M) || H+ (0.20M), MnO4-(0.35M), Mn2+(0.15M) | C(s) Determine the cell potential. ii. Is this reaction spontaneous? Prove using ∆G. iii. The equilibrium constant can also be found from Standard Cell Potentials. Eventually the cell will
  66. Chemistry

    I need help finding reactions beneficial to society. Here's the assignment quoted. "Your assignment is to research two different chemical reactions that are used to address social/environmental needs or problems. These reactions must clearly be attempting
  67. Chemistry

    I need help finding reactions beneficial to society. Here's the assignment quoted. "Your assignment is to research two different chemical reactions that are used to address social/environmental needs or problems. These reactions must clearly be attempting
  68. chemistry

    Fluorine gas can react with ammonia gas to produce dinitrogen tetrafluoride gas and hydrogen fluoride gas. This reaction is described by the following balanced equation: 5 F2 (g) + 2 NH3 (g) N2F4 (g) + 6 HF (g) What mass of hydrogen fluoride gas is
  69. Spanish

    I was hoping that I could get some to look my essay and tell me the proper tenses of the verbs. In the first paragraph the imperfect tense of the verb and in the second paragraph the need to be preterit tense. If you could help that would be great. Cuando
  70. chemistry 20 MC questions

    1- The equipment needed to carry out a titration is: A) hot plate, pipet, and filter paper B) heat source, test tube, and filter paper C) heat source, pipet, and burette D) erlenmeyer flask, pipet, and burette 2- A student correctly predicted that 10.0 g
  71. physics

    This graph in the figure (Figure 1) shows how the temperature of an initially solid sample changes as time goes by when it is placed above a flame that delivers a constant heating power (that is, a fixed amount of energy input in the form of heat each
  72. Chemistry

    Electrochemisry. Candy Chemist wishes to determine the concentration of CrO4^2- by electrochemical means in solution, and subsequently the Ksp of Ag2CrO4. She sets up one half-cell comprised of the Ag+|Ag couple (E=+0.799V) and a second half-cell in which
  73. biology

    What are endergonic reactions? How can endergonic reactions proceed in organisms? An endergonic reaction is a chemical reaction where the reactants have a lower free energy than the products. Enderonic reactions are coupled to exergonic reactions which
  74. University Organic Chemistry

    Lab questions to Diels Alder butadiene experiment : Why do the anhydride groups of the maleic anhydride reactant help the Diels-Alder reaction go faster? Why does the diene need to be in the s-cis conformation to give the cyclic product? Why is it not
  75. Chem

    Part A : This is the first law of thermodynamics question. case 1 - the system expands and the surroundings get hotter case 2 - the system expands and the surroundgins get colder case 3 - the system contracts and the surroundings get hotter case 4 - the
  76. Chemistry

    Which group in the periodic table (1A... 5A) reacts with H2 to form compounds with the general formula MH2? Which reacts with F2 to form compounds with the general formula MF2? Any help would be great, thanks. Wouldn't Group IIa fit this bill?
  77. Chemistry

    The oxides of Group 2A metals (symbolized by M here) react with carbon dioxide according to the following reaction: MO(s) + CO2(g)  MCO3(s) A 2.85-g sample containing only MgO and CuO is placed in a 3.00-L container. The container is filled
  78. math

    Consider the cubic graph y = 3x^2 − x^3. (a) Write 3x^2 − x^3 in factored form. (b) Use this form to explain why the graph lies below the x-axis only when x > 3, and why the origin is therefore an extreme point on the graph. I mostly need
  79. math

    the straight L has gradient 3 and passes through the point A(-6,4). a) find an equation for L in the form y=mx+c b) straight line R has the equation in the form of -7y+x+14=0. Given that R crosses the y-axis at the point B and intersects L at the point C,
  80. Makalema secondary school

    Aluminium reacts with oxygen to form aluminium oxide.How many grams of potassium chlorate would be heated to produce enough oxygen to form 5.1 grams of aluminium oxide?
  81. maths

    consider the sequence given by U1=-0.3 Un+1=Un+0.7 i)state what type of sequence this is. ii)write down the first 4 terms of the sequence. iii) find a closed form for sequnce. iv) use the closed form to find the nth term of the sequnce when Un=36.1
  82. physics

    The forces acting on the arm of a person lifting a dumbbell. The force F is the force pulling on the hand due to the weight of the dumbbell, the force Warm is the weight of the arm and T is the tension due to the muscles connecting the arm and the trunk.
  83. Chemistry

    Iron metal reacts with oxygen gas to produce iron(III) oxide. If you have 12.0 moles of iron, for complete reaction you need: (HINT you need the balanced chemical reaction!) A) 9.0 moles of O2 and produce 3.0 moles of Fe2O3 B) 9.0 moles of O2 and produce
  84. chemistry

    The alcoholic fermentation of350 g/l glucose syrup ceases when the alcoholic degree of the mixture attains 16º (16ml ethanol in 100ml of the solution) Write the reaction of the fermentation reaction. Consider the fermentation of 100L of the glucose syrup.
  85. chemistry

    We did this in a lab and nothing happened, but I'm pretty sure something was supposed to happen, so my question is: What happens when you put a pellet of sodiumhydroxide on a watch glass and observe it for 5-10 minutes? If there were hudidity in the air,
  86. Chemistry...Please Help

    The Chemicals are: Baking Soda- NaHC03 Calcium Chloride- CaCl2 Bromothymol Blue - (acid base indicator) _______________________________________ What is: (a) The equations for the dissolution of calcium chloride and sodium bicarbonate in water (b) Look up
  87. Reaction Engineering

    The irreversible elementary reaction 2A ---+ B takes place in the gas phase in an isothermal tubular (plug-Jlow) reactor. Reactant A and a diluent C are fed in equimolar ratio, and conversion of A is 80%. If the molar feed rate of A is cut in half, what is
  88. Math

    A solid sphere of 1.46kg and radius 0.1m, is rolling down a rough plane that is inclined at an angle 30 degrees to the horizontal. The 3 ferces acting on the sphere are its weight, friction force and the normal reaction. The sphere starts rolling down when
  89. Math

    A solid sphere of 1.46kg and radius 0.1m, is rolling down a rough plane that is inclined at an angle 30 degrees to the horizontal. The 3 forces acting on the sphere are its weight, friction force and the normal reaction. The sphere starts rolling down when
  90. Chemistry

    H6P6: Urbium Oxide First Part of the Question: Urbium (Ur) is an upscale element found in big cities. Its oxide (UrO2) is not very stable and decomposes readily at temperatures exceeding 66∘ C. The figure below shows how the rate of reaction varies
  91. adjective

    Biking is a cheap form of transportation, but walking might be safer. Driving is usually the fastest method of getting around. However, careless drivers with their distracting cell phones make the roads dangerous for everyone 1. In the above passage An
  92. math

    how do i write an equation in point slope form when the slope= -1/2 and it passes through (5,-8) and then how do i write an equation for the line in slope-intercept form? thanks
  93. chemistry hellllllllllllllllllp

    Oxidising and reduction- Chemistry? Oxidation and reduction can be described as the loss and/or gain of electrons from an ion or atom (species) in a chemical reaction. For the following aqueous reaction, select the species that is oxidized and similarly
  94. Anatomy

    I'm posting this again today hoping someone can clarify this for me- I have two question 1.In a dehydration synthesis reaction which of the following occur- a. hydrogen and oxygen are removed from the reactant b. water is added to the reactants c. water is
  95. Chemistry

    (a) Which of the following are requirements for anionic polymerization? 1-A double bond 2- End groups which can react by releasing a small molecule 3- A strong base to initiate the reaction 4- A strong acid to initiate the reaction 5- An
  96. chem. stuff+5

    9. The reaction 2 H2O(l)>>>O2(g) + 2 H2(g) requires 2.06 V, but the reaction 2 H2O(l) + 2 Cl –(aq)>>> H2(g) + 2 OH –(aq) + Cl2(g) requires 2.19 V. If a 1.0 mol/L solution of aqueous NaCl is electrolyzed, what voltage should be applied
  97. chemistry

    I can't figure this question out for the life of me. If anyone could help me, that'd be great! Given change of heat of formation for Cu^2+ (aq)=+71.7kJ/mol and that for Zn^2+(aq)= -153.9kJ/mole; find the heat of reaction for: Zn(s) + Cu^2+(aq) ->
  98. chemistry

    4NH3 + 5O2 → 4NO + 6H2O 2NO + O2 → 2NO2 3NO2 + H2O → 2HNO3 + NO In this process, the NO made in the last reaction is recycled back into the second reaction and used as a reactant. In the end, all of the NO produced is recycled back so
  99. Temperature Problem

    Q: A reaction rate has a constant of 1.23 x 10-4/s at 28 degrees C and 0.235 at 79 degrees C. Determine the activation barrier for the reaction. A: My work thus far: ln(1.23 x 10-4/0.235)=(Ea/8.314)(1/301.15-1/352.15) -7.551=(Ea/8.314)(0.0048090535)
  100. Chemistry

    Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g)  2SO2(g) + O2(g); H° = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the