What is the empirical of compound (X) going through the following decomposition reaction?

79,678 results, page 37

  1. Chemistry

    Calculate the enthalpy of formation if 78.5 g of carbon dioxide in the following reaction: C(s) + H2O(g) --> CO2(g) Use the following equations: a) H2O(l) --> H2(g) + (1/2)O2(g): Δ°f = +285.8 kJ/mol b) C2H6(g) --> 2C(s) + 3H2(g): Δ°f = +84.7 kJ/mol c) 2CO2(g) + ...
  2. Chemistry

    A 1.0-mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.010 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. a color change occured after 40 seconds. the rate of reaction is measured by the disappearance of HIO3. got the reaction mixture in ...
  3. English

    1. What are you going to do for Chuseok? I am going to buy some gifts tonight and I will hand them to my cousins on/for Chuseok. (Can we use 'for' in Sentence 1 before Chuseok?) 2. What are you going to do on Chuseok? Three days ago, I bought some gifts for chuseok, so I will ...
  4. Public Speaking

    To avoid speaking in monotone, a strategy to use can include: A. changing pitch and tone of voice. B. voice inflection. C. varying rate and pace of speaking. D. All of the above I read through my notes and I see A and B as answers, I don't see anything about C... But I'm going...
  5. 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 me. the equation i got...
  6. chemistry

    The fermentation of glucose to form ethanol occurs according to the following chemical reaction: C6H12O6(aq) → 2 C2H5OH(l) + 2 CO2(g) A) If 700 grams of glucose (C6H12O6) are fermented, what is the maximum volume in milliliters of ethanol (C2H5OH) that can form? (Density of ...
  7. Organic Chemistry

    Rearrangement In Sn2 reactions do not occur because A. they are especially fast and hence do not have time to rearrange. B. it goes through a concerted transition state with no carbocation intermediate. C. you do get rearrangements in Sn2 reaction D. None of the above I ...
  8. us history

    Read the following paraphrase from George Washington's Farewell Address and answer the question that follows. People have the right to make and alter their governments. But the Constitution is sacred law until changed by the whole people together. The very idea of the power ...
  9. HCA/220

    Summarize the process of blood clotting, immune response, allergic reaction, and hormone release and how they interrelate. I know they all seam to have to travel through the blood somehow but I can't put it all together.
  10. chemistry

    write the balanced equation for the production of oxygen gas and potasium chloride from the decomposition of the potasium chlorate
  11. Chemistry Help

    How many moles of H2 and N2 can be formed by the decomposition of 0.250 mol of ammonia, NH3? Is it 0.250*3mol H2=0.75 0.25*1mol N2=0.25 Am I correct?
  12. Chemistry

    The weight of kclo3 which thermal decomposition o2 gas sufficient for the combustion of 1.12 litres of ethlene gas at STPis
  13. 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 and the common ...
  14. chemistry

    2. Bromine can be added to limonene to create a brominated compound. The balanced equation is shown below. When 613 mg of limonene and 3.5 mL of a 10% (v/v) solution of Br2 in dichloromethane (a solvent) are combined, 959 mg of the product is isolated. Calculate the percent ...
  15. Physics

    You drive due east at 77 km/h for 55 min . Then you follow a road going 60∘ south of east, going 96 km/h for another 28 min . Find your total displacement.
  16. chemistry

    a current is passed through 500 mL of a solution of CaI2. the following electrode reactions occur: anode: 2I- ---> I2 + 2e- cathode: 2H2O + 2e- ---> H2 + 2OH- after some time, analysis of the solution shows that 35.7 mmol of I2 has been formed. a) how many faradays of ...
  17. Chemistry

    According to the following reaction, how many moles of water will be formed upon the complete reaction of 22.6 grams of hydrochloric acid with excess iron(III) oxide? hydrochloric acid (aq) + iron(III) oxide (s)--> water (l) + iron(III) chloride (aq)
  18. English grammar

    Complete the following sentences, using going to wherever possible and will or shall in other cases : 1 The gardener_____(water) the lawn if we tell him. 2 He____(clean) his room this evening.
  19. chemistry

    Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH_4NO_3(s) rightarrow NH_4...
  20. Chemistry

    for the reaction 4NH3(g) + 5O2(g) <--> 4NO(g) + 6H2O(g) if H = -950kJmol-1, does that mean it's an exothermic reaction? Ooops pressed Post too quickly. Yes it is exothermic. Delta H is negative so heat is lost from the system. If delta H is positive a reaction is ...
  21. Chemistry

    Asprin C9H8O4 is made by the reaction of salicylic acid C7H6O3 and acetic anhydride C4H6O3. The other product in the reaction is acetic acid HC2H3O2. How many of each reactant should be used to produce 75.0g of asprin. Assume that the reaction gives a 68.2% yield.
  22. chemistry

    1) If a total of 13.5 mol NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of COs and NA3C6H5O7 will be produced? 3NaHCO3(aq) +C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq) 2) If 8,00 mol of NH3 reacted with 14.0 mol of O2, how many moles of H20 will be produced? 4NH3(g...
  23. English

    Leonardo da Vinci believed in soper vedere, or the power of observation. While his contemporaries looked for scientific truth in the writings of ancient scholars, da Vinci's theories were based on empirical research, that which he observed and recorded in his many notebooks. "...
  24. Chemistry

    A 0.960mol quantity of Br2 is added to a 1.00 L reaction vessel that contains 1.23mol of H2 gas at 1000 K. What are the partial pressures of H2, Br2, and HBr at equilibrium? At 1000 K, Kp=2.1×106 and ΔH∘ = -101.7 kJ for the reaction H2(g)+Br2(g)⇌2HBr(g). Dr ...
  25. chemistry

    The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
  26. chemistry need help soon

    Would the compound K2O be considered solute in water? Would the compound BaSO4 be considered solute in water?
  27. Literature- Antigone dialogue

    This is my alternate ending to Antigone please feel free to comment on it, and give me a letter grade. I'm in 10th grade. Does it sound good so far I'll post the other half as soon as you comment Antigone: I deserve to die Polynecies meant everything to me He was my blood and ...
  28. Chemistry

    For a reaction N2+O2=2NO If Kc=10-30 at 25°C One Can predict (1) More NO is formed (2) The forward reaction goes to completion (3) The backward reaction goes to completion (4) More reactant can consumed
  29. chemistry

    in a compound of nitrogen and oxygen, 14.0 grams of nitrogen combines with 32.0 grams of oxygen. How much oxygen is required to combine with a sample of 10.5 grams of nitrogen in producing same compound? How do you do the math?
  30. Geometry

    1.) A skateboard ramp has a 158° entry angle. Find the measure of ∠1. 2.) Which of the following equations is parallel to the line passing through A(-2, 7);B(-2, -2)? 3.) Which of the following equations would graph a line parallel to 3y = 2x - x + 5? *Please help me!
  31. organic chemistry

    Provide a structure for the following compound: C9H10O3; IR: 2400–3200, 1700, 1630 cm–1; 1H NMR: δ 1.53 (3H, t, J = 8 Hz); δ 4.32 (2H, q, J = 8 Hz); δ 7.08, δ 8.13 (4H, pair of leaning doublets, J = 10 Hz); δ 10 (1H, broad, disappears with D2O shake)
  32. organic chemistry

    Provide a structure for the following compound: C9H10O3; IR: 2400–3200, 1700, 1630 cm–1; 1H NMR: δ 1.53 (3H, t, J = 8 Hz); δ 4.32 (2H, q, J = 8 Hz); δ 7.08, δ 8.13 (4H, pair of leaning doublets, J = 10 Hz); δ 10 (1H, broad, disappears with D2O shake)
  33. Calculus

    I'm studying infinite series and am really struggling with memorizing all the tests for convergence in my book, there's like 10 of them. I don't think I'm going to be successful in memorizing all of them. I will never be asked in my course to use a specific test to determine ...
  34. ms sue y u not helping me

    ms sue i wanna get this done before going to sleep, please provide me with help, atleast the first question, i don't get it. could you give me a small anser so i can atleast figure whats going on.
  35. physics

    a box (mass = 12 kg ) is going south at 12 m/s. A second box (mass = 18 kg ) is going northwest at 15 m/s. they collide and stick together. what is their common velocity (magnitude and direction ) after the collision
  36. CHEMISTRY

    A lamp of marble chips was dropped in excess 0.1mol/dm hydrochloric acid and observed for sometime. (a) State what you would see. (b)Describe how the rate of reaction changed with time. (c)Explain why the reaction stopped after sometime. (d)The reaction was rather slow.State ...
  37. Chemistry

    (a) The figure above shows how the energy of a system varies as a chemical reaction proceeds. Match the numbers features labeled on the figure above to their corresponding statements below: energy state of the reactants: 1/2/3/4/5 activation energy of the reaction: 1/2/3/4/5 ...
  38. Chemistry

    Given the following hypothetical equations, 2A + B → 3C + 2D ΔH = -46.7kJ C → B ΔH = 13.1kJ 2E → B ΔH = 84.5kJ, what is the enthalpy change (kJ) for the following reaction? A → D + 2E
  39. math

    Find the total number of compounding periods and interest rate per period.  Princial: $700, time period :8yrs , nomial rate: 1.5%, interest compounding :monthly, copounding amount________, compound interest_______  * i need to figure outhe compounding amount & compound interest
  40. Chemistry

    A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles of gas, n, to be 0.0443 mol. The weight of ...
  41. chemistry

    Write the balanced chemical reaction for the rusting of iron? the acidic vinegar dissolved a protective coating off the steel wool, allowing the oxidation of the steel to begin. This process is called rusting. In this reaction, iron(III) is combined with oxygen gas to form ...
  42. stoichiometry

    1.how many mole, Fe can be made from Fe2O3 by the use of 20 moles of carbon monoxide, CO in the following reaction? Fe2O3+ 3CO = 2Fe+ 3CO2 2. How manhy moles of H2O are produced when 2.75 moles of O2 are consumed if burning methyl alcohol, CH3OH, according to the following ...
  43. chem

    I have the following problems- write net ionic equations for reactions if no reaction write NR.... silver nitrate and ammonium carbonate sodium phosphate and potassium nitrate silver nitrate and barium chloride copper (II) chloride and sodium hydroxide cobalt (III) chloride ...
  44. Chemistry

    If 2.5 g of element A combine with 5 g of element B to form compound AB how many grams of B are needed to form compound AB2? Which law did you use to answer this question ? My answer is 7.5 g. Im not sure if this is right. Please help this is due Thursday morning C an you ...
  45. Physics

    Computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. For instance, as a car is going through a turn, a speed of 201 mi/h (89.847 m/s) and a centripetal acceleration of 4.00g (four times ...
  46. chemistry

    "Ag(s) reacts with none of the 4 (solutions of Ag^+2, Pb^+2, Cu^+2, Zn^+2}. So Ag(s) goes at the bottom of the table for now although there may be some metals below silver when you finish with the entire table. Cu(s) reacts with (Ag^+ solution) so Cu goes above Ag ion. It is ...
  47. Chemistry (1Question)

    This is really confusing. I know how to do the equilibrium which also has to do with reaction rates but they didb't give it to me as a choice. Please Please help me. I post other questions that i answered already but no one answered me. I just needed someone to check them for ...
  48. chem

    ---------- A compound has the formula Mg3X2. If 1.87 g of X combines with 4.86 g of magnesium, what is the atomic weight of X? A) 7.0 B) 14.0 C) 21.0 D) 28.0 E) 32.0 ---------- I'm having a really rough time with this one. It seems the total weight is 6.73 g, and that 27.79% ...
  49. chemistry

    name the following compounds and tell what type of compound they are (binary ionic. ternary ionic, or binary molecular) a)FeBr3 b)CBr4 c)Na2Cr2O7 still haven't gotten help yet and i posted a response to the question below
  50. Math

    I need to find the equation for the following (compound interest): number of years: 12 initial principal: 10000 annual interest rate: 0.03 additional investment each subsequent quarter: 500 The value in 12 years is 43074.4088874
  51. chemistry

    A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reaction mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who helps me
  52. English

    1.He delayed doing/to do his homework. 2.He suggested going/to go on a picnic. 3.He quit smoking/to smoke. 4.He avoided meeting/to meet the lady. 5.He proposed going abroad/to go abroad. (Which one is correct? Do we have to use only gerunds in the sentences above?)
  53. Pls help me now

    A 75g person on skis is going down a hill sloped at an angle 30.the coefficient of kinetic friction between the skis and the snow is 0.15.how fast is the skier going 10s after starting from rest?(answer=36m/s)
  54. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Zn2 ] = 0.842 M and [Ni2 ] = 0.0100 M. Standard reduction potentials can be found here. reaction: Zn(s)+Ni^2+(aq)--->Zn^2+(aq)+Ni(s) standard reduction Zn: -.76 standard reduction ...
  55. chemistry

    write a balanced chemical equation for the following reaction including states not complete; no question.
  56. chemistry

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

    how many molecules of Xef6 are formed from 12.9L at 298K and 2.6atm according to the following reaction. assume excess is Xe
  58. Chemistry Check

    Which one of the following substances is the product of this combination reaction? Al(s) + I2(s) => ______ For this it would be AlI3 ?
  59. chemistry

    assuming the following reaction proceeds in the forward direction, what is oxidized and what is reduced? Cu2+ (aq) + Ca(s) --> Cu (s) + Ca2+ (aq)
  60. 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)?
  61. CHEMISTRY

    how much energy would be released in the following reaction CH4 + 2O2--> CO2 + 2H2O
  62. chemistry

    what is the reaction with sodium hydroxide for the following metals: Al3+ Fe3+ Mn2+ Ni2+ Zn2+
  63. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
  64. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
  65. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
  66. Chemistry

    In the following reaction, which substance is acting as the Brønsted-Lowry acid? NH3 + H2O NH4+ + OH
  67. chemistry

    write the net ionic equation of the following reaction: HCl(aq)+NaOH(aq)--> NaCl(aq)+H2O(l)
  68. chemistry

    When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)
  69. Chemistry

    The following reaction has a Delta G value of 42.6 kJ/mol at 25oC: HB(aq) +H2O(l) --> H3O+(aq) +B-(aq) Calculate Ka for the acid HB.
  70. chemistry

    Determine the entropy change for the following displacement reaction Cl2(g) + PbBr2(aq) --> PbCl2(aq) + Br2(l
  71. Chemistry

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

    What is the reducing agent in the following reaction? 2NA + 2H2O 2NaOH + H2 A.Na B.H2O C.NaOH D.H2 I think it is B...?
  73. Chemisty

    Calculate the standard enthalpy change for the following reaction at 25 °C. MgCl2(s)+H2O(l)-->MgO(s)+2HCl
  74. chemistry

    Balance the following redox reaction by inserting the appropriate coefficients. H^+ +CrO4^2- +NO 2^- =Cr^3+ +H2O+NO3^-
  75. Chemistry

    Calculate the standard enthalpy change for the following reaction at 25 °C. MgCl2(s) + H2o(l) ---> MgO(s) + 2HCl(g)
  76. Chemistry

    Calculate the equilibrium constant for the following reaction at room temperature, 25 ∘C: N2(g)+O2(g)→2NO(g)
  77. Chemistry

    Calculate the standard enthalpy change for the following reaction at 25 °C.? 2CH3 OH(g) + 3O2(g) -------- 2CO2(g) + 4H2O (g)
  78. Chemistry

    2H2O(g)<-> 2H2(g) + o2 Calculate delta g and Kp for the following equilibrium reaction. Keep getting 7.2E-81 and the answer is 4.5E-81 Why?
  79. Chemistry

    For the following reaction, identify the substance being oxidized and reduced CH4 + 2 O2 = CO2 + 2 H2O
  80. Chemistry

    Write the net ionic equation for the following reaction : Na3SO4(aq) + Ba(NO3)2(aq) —> BaSO4 (s) + 2 NaNO3(aq)
  81. Chemistry

    The decomposition of HI(g) is represented by the equation: 2HI(g) <-> H2(g) + I2(g) Kc= 64 at 25°C. If the equilibrium concentrations of H2 and I2 at 400°C are found to be [H2] = 5.4x10-4 M and [I2] = 8.8x10-3 M, what is the equilibrium concentration of HI?
  82. Chemistry H

    For the decomposition of aluminum oxide at 35 celsius and atm, what volume of oxygen gas will be produced if 2.77 grams of the oxide react?
  83. Science

    True or false? decomposition is an important part of only two of the three nutrient cycles I think it's true. Thanks
  84. URGENT -- Chemistry

    When 0.500 g of an unknown compound was dissolved in 15.0 g benzene, the freezing point depression was determined to be 0320C. The molar mass of the unknown compound is ?? g/mol. (The freezing point depression constant for benzene is 5.12C kgmol. I really don't know where to ...
  85. Chemistry

    ELement A has a valence electronic structure of ns2np1. Element B has the valence electronic structure of ns2np5. Write a formula for the compound that would be formed from elements A and B. Element A has three electrons to lose to make the last shell eight. Element B has 1 ...
  86. calculus

    Hi, I am lost on couple of problems and i was wondering if you could just help me out with them. 1. Find and classify the points of discontinuity of the function F(x) = (x^2+7x+12)/(x^3-9x) now for this problem i know there is going to be an infinite discontinuity because of ...
  87. Chemistry

    True or false 1. The energy of a collision between atoms or molecules must be greater than the activation energy for bonds to be broken? 2. Decreasing the temperature decreases the kinetic energy of the reactant, and the reaction goes more slowly? 3. two or more atoms must ...
  88. 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 order of the reaction. (...
  89. AP Chemistry

    iN A LAB, the orders of two reactants, A and B, were determined experimnetally to be 2 and 3 respectively. a. write the rate law for this reaction. c. what would happen to the rate of the reaction if A were Doubled? d. what would happen to the rate of the reaction if B were ...
  90. Abnormal Psychology

    The formal assignment of a clinical case to a DSM-IV-TR classification category is referred to as a/an _______ diagnosis. A. empirical C. proper B. taxonomic D. psychological
  91. Math

    If you roll a die 48 times and 8 of the rolls result in a "5," what empirical probability was observed for the event "5"? (Give your answer correct to three decimal places.)
  92. Math

    If you roll a die 48 times and 8 of the rolls result in a "5," what empirical probability was observed for the event "5"? (Give your answer correct to three decimal places.)
  93. Math

    If you roll a die 48 times and 8 of the rolls result in a "5," what empirical probability was observed for the event "5"? (Give your answer correct to three decimal places.)
  94. Chemistry

    Determine the empirical and molecular formulas for vanillin given that its molar mass is 152 g/mole and its composition is: 63.15% carbon, 5.30 % hydrogen and the rest oxygen
  95. statistics

    "suppose that IQ scores have a bell-shaped distribution with a mean of 97 and standard deviation of 17.Using empirical rule, what percentage of IQ score are less than 46?"
  96. Statistics

    Using the empirical rule, 95% of female heights should be between what two values? Either show work or explain how your answer was calculated
  97. Chemistry

    Could someone explain the reasoning for this? 6) Which of the following is a false statement about ALL reactions in equilibrium? a) Increasing temperature shifts the reaction toward the products in an endothermic reaction b) Temperature effects on the equilibrium do not depend...
  98. Chemistry

    Identify the following chemical equations by type. 1. If an electric discharge produces 800 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 75.0 dm3 of O2 react with an excess of glucose (C6H12O2), according to the reaction below, ...
  99. Chem

    Which of the following pairs of elements are likely to form an ionic compound? lithium and chlorine sodium and potassium phosphorus and chlorine sodium and nitrogen argon and potassium
  100. Statistic

    Heights of men on a baseball team have a​ bell-shaped distribution with a mean of 169 cm169 cm and a standard deviation of 9 cm9 cm. Using the empirical​ rule, what is the approximate percentage of the men between the following​ values? a. ​% of the men are between 142...
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