1. Chemistry

    A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.0 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the bottom of the cylinder ...
  2. 11th grade

    A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.0 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the bottom of the cylinder ...
  3. chem

    combustion analysis of a 285.7 mg sample of a hydrocarbon produces 880.8 mg of CO2 ans 405.7 mg of H2O. What is the empirical formula of the compound? a rough measurement of the molecular weight indicates it is a little over 100mg/mol. what is the molecular formula of the ...
  4. Chemistry

    The rate constant for the decomposition of gaseous azomethane, C2 H6 N2 (g) > N2 (g) + C2 H6 (g) Is 40.8 min-1 at 425OC. Find the number of moles azomethane and the number of moles of nitrogen 0.0500 minutes after 2.00 g of azomethane is introduced. Assume that the ...
  5. Separation of Racemate- Chemistry Lab

    Compare the relative reaction rates of 1-bromobutane, 2-bromopropane, and 2-bromomethylpropane under SN1 reaction conditions. Silver nitrate will be used to provide nitrate ion as the nucleophile to produce alkyl nitrates as products. 1) I found the answer for this one. 2) You...
  6. Separation of Racemate

    Compare the relative reaction rates of 1-bromobutane, 2-bromopropane, and 2-bromomethylpropane under SN1 reaction conditions. Silver nitrate will be used to provide nitrate ion as the nucleophile to produce alkyl nitrates as products. 1) You have a choice of acetone or ethanol...
  7. Chemistry- Please help me

    A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00 cm, and a piston is carefully placed on the surface of the compound so that, for all practicla purposes, the distance between the bottom of the cylinder ...
  8. AP Chemistry

    I have the following marathon problem but am unsure where to start: A Sample consisting of 22.7g of nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00cm, and a piston is carefully placed on the surface of the compound so that, for all ...
  9. AP Chemistry

    I have the following marathon problem but am unsure where to start: A Sample consisting of 22.7g of nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.00cm, and a piston is carefully placed on the surface of the compound so that, for all ...
  10. Chemistry

    What is the empirical formula for a compound that is 1.67g Ce and 4.54g I?
  11. Chemistry

    A compound contains 69.9% iron and 30.1% oxygen. What is its empirical formula?
  12. chemistry

    A 12.0g sample of carbohydrate contain 4.50g of carbon, 3.25g of oxygen, and some hydrogen. Determine the percent by mass of hydrogen in your product. Find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is 20.2 % by mass. . A ...
  13. chemistry

    Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by monitoring the partial pressure of azomethane, in torr. Time (min) 0, 15, 30, 48, 75 Pressure(torr)36.2, 30, 24.9,19.3, 13.1 Determine the instantaneous...
  14. Chemistry

    The question is with a lab that I have already done. Here are my numbers moles of malachite in 1g 221.12 moles of CuO produced 141.57 ratio of moles of CuO produced per moles of malachite decomposed 79.55 Use the mole ratio of CuO produced per mole of malachite to write a ...
  15. Chemistry

    calculate the empirical formula. A chemist heats 50.00g of sulfur under controlled conditions to produce a sulfer-oxygen compund.The mass of the sulfur-oxygen compound is 100.00g. What is the empirical formula of the sulfur-oxygen?
  16. chemistry

    a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete, unreacted aluminum ...
  17. Chemistry

    A 185.325 g sample of a compound of carbon, nitrgoen and hydrogen is burned completely. Calculate the empirical formula if 225.0 g of water and 230.0 g of NO2 is formed. In another experiment the sample was found to have a density of 10.9 g/L at 1.20 atm and 25.0 degrees ...
  18. chemistry

    decomposition of water to form elemental Hydrogen and Oxygen gas. What will be the balanced chemical equation, type of reaction and the driving force of the reaction?
  19. Chemistry

    Help-I'm really confused- If you have an equation where H is positive + OH negative and reaction arrows go both ways-with H2O as product, what type of reaction is this and why- either neutralization,hydrolysis,decomposition or esterification Thank you very much
  20. Separation of Racemate- Chemistry Lab

    Compare the relative reaction rates of 1-bromobutane, 2-bromopropane, and 2-bromomethylpropane under SN1 reaction conditions. Silver nitrate will be used to provide nitrate ion as the nucleophile to produce alkyl nitrates as products. 1) You have a choice of acetone or ethanol...
  21. chemistry.

    What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? ..My answer is NaSO and I am not sure... can anyone help me for it?????????
  22. empirical formula of a compound

    how many grams of Mg combine with 1.50 g of Cl ions in MgCl2 ?
  23. Chemistry

    Predict the empirical formula of the ionic compound, Cs and C. How would I do this? Is it Cs_2C?
  24. Chemistry 3A

    calculate the empirical formula for an unknown compound from the following information: C= 39.2%, H= 8.73% and O= 52.1%
  25. Chemistry

    If the decomposition reaction of 1.4 M initial hydrogen peroxide (H2O2) occurs so that after 3 minutes, 0.83 M is left, what is the rate of the reaction? a. -0.019 M/s b. -0.012 M/s c. 0.0046 M/s d. 0.0032 M/s Please help! Thanks in advance.
  26. chemistry

    Lime, CaO, is produced by the decomposition reaction CaCO3(s) ® CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?
  27. Chem

    I just need to know if I did the problem correctly. The decomposition of phosphine, a very toxic gas, forms phosphorus and hydrogen in the following reaction: 4PH3(g) → P4(g) + 6H2(g) If the instantaneous rate of the reaction with respect to PH3 is -0.41 M s-1, what is ...
  28. Chemistry

    Maleic acid is an organic compound composed of 41.39% C, 3.47% H, and the rest oxygen. If 0.271 mol of maleic acid has a mass of 31.4 g, what are the empirical and molecular formulas of maleic acid? My work: C: 41.39 g x (1 mol/12.01 g) = 3.44629 = 1 H: 3.47 g x (1 mol/1.008 g...
  29. chem

    When 3.517 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 11.59 grams of CO2 and 3.164 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to be 40.06 g/mol. Determine the empirical formula and the ...
  30. chemistry

    Some properties of the two compounds are listed below: Melting point- Compound X= -114*C Compound Y= -138*C Boiling Point- Compound X= 78*C Compound Y= -22*C Net Dipole?- Compound X= Yes Compound Y= Yes Functional group: Compound X Alcohol Compound Y= Ether i.) Draw plausible ...
  31. Chemistry

    Determine the empirical formula for the compound that contains 55.0 g carbon and 294 g sulfur
  32. Chemistry

    What is the empirical formula of a compound that has a carbon-to-hydrogen ratio of 2 to 6? Is it CH3?
  33. Chemistry

    Calculate the empirical formula for the compound 1.245g Ni, 5.381g I Can you help with the steps please
  34. matla

      4.6 g of an oxide of nitrogen contains 3.2 g of oxygen. Calculate the empirical formula of the compound.
  35. chemistry

    Calculate the empirical formula of each compound from the mass-composition data given below. A)41%N and 59%O B)45%Na,23%P and 32%O
  36. chemistry

    Predict the empirical formula of the compound formed by each of the following pairs of elements.a) Li,S b) Na,H c) Al,l d) Ca,O
  37. Chemistry

    What is the empirical formula for a compound which contains 67.1 percent zinc and the rest is oxygen
  38. Chemistry

    The decomposition of ethane, C2H6, is a first-order reaction. It is found that it takes 212 seconds to decompose 0.00839 M C2H6 to 0.00768 M. What is the rate of decomposition (in mol/L-h) when [C2H6] = 0.00422 M? A. 6.43 x 10^-3 mol/L-h B. 6.34 x 10^-5 mol/L-h C. 6.34 x 10^-3...
  39. College Chemistry

    The rate constant for decomposition of compound X was determined to be 1.0x10^-4 s-1 at 298 K and 1.0x10^-2 at 365 K. The activation energy for reaction is: I don't know if this is correct 8.314 x 10^-3 x 298x365 divided by 365 - 298 x In 1.0 x10^-2 divided by 1.0-4. This ...
  40. chemistry

    How do I find the empirical formula for aluminium selenide? You have to have some data, such as masses, or percent: Empirical means it was measured. The empirical formula for aluminium selenide is the same as it's molecular formula; Al2Se3. The empirical formula requires both ...
  41. chemistry

    Which of the following describes the compound Mn(NO2)2? If the compound dissolved in water it would be a strong electrolyte. The compound is ionic. The compound would conduct electricity if molten. The compound is molecular. The compound would be expected to have a relatively ...
  42. Chemistry

    The following reaction represents the decomposition of hydrogen peroxide: 2H2O2 -> O2 (g) + 2H2O (l) How many molecules of water are produced from the decomposition of 3.4g of hydrogen peroxide, H2O2? Please help, I got 0.02 molecules of water but need to verify my answer (...
  43. chemistry

    Determine the empirical formula of a compound found to contain the following 52.11% carbon, 13.14% hydrogen, and 34.75% oxygen
  44. Science-chemistry

    A compound is found to have 56.4% potassium, 8.7% carbon, and 34.9% oxygen. What is the empirical formula?
  45. Chem

    A 18.46 g sample of a compound contains 5.89 g potassium (K), 5.34 g chlorine (Cl), and oxygen (O). Calculate the empirical formula.
  46. College chem

    what is the empirical formular of the following compound: 0.142 g phosphorus with 0.436 g of fluorine.
  47. chemistry 110

    Calculate the empirical formula of a compound containing 52.14% C, 13.12% H, and 34.73% O. I don't understand how they got the answer. please help
  48. Chemistry

    a)Would you expect the empirical formula you determine for magnesium oxide to be the same as the one determined by another student? b) Would you expectan empirical formulato be the same even though different masses of Mg were used? Briefly explain. c) If different masses of mg...
  49. General Chemistry

    Answer Check Please... A compund contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has desity of 0.925g/L at 690 torr and 110 degrees Celsius. What is the molecular formula of the compound? My Empirical Formula = H2N Molecular ...
  50. Chemistry- Empirical Formula

    Aniline, consists of C, H, and N. Combustion of such compounds yields CO2, H2O, and N2. If the combustion of 9.71 mg of aniline yields 6.63 mg H2O and 1.46 mb N2, what is the empirical formula? What is the molecular formula of a compound with the molecular weight of 372.504 ...
  51. Chemistry

    Consider the decomposition reaction: AB(g)-->A(g)+B(g). The rate law for the reaction is: rate=k[AB]^2, where k=0.00846 M^-1 min^-1. After 5.25 hours, what is the percent of AB that decomposed if the initial concentration is 2.00 M?
  52. Cedar High school

    A compound is found to have 56.4% potassium, 8.7% carbon, and 34.9% oxygen. What is the empirical formula?
  53. chemistry

    Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.
  54. chemistry

    Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.
  55. chemistry

    Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.
  56. chemistry

    What is the empirical formula of a compound that is 14 g calcium, 11 g oxygen, and 0.7 g hydrogen? A. CaO2H B. Ca2OH2 C. CaOH D. Ca(OH)2
  57. AP Chemistry

    A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter of 20.0 cm. After the sample is added, the piston is placed in contact with the liquid and the piston vent is closed. This process removes all ...
  58. Chemistry

    A decomposition reaction has a rate constant of 0.0019 yr -1. ( a) What is the half-life of the reaction? ______ yr (b) How long does it take for [reactant] to reach 12.5% of its original value? ______ yr
  59. Physics

    What type of reaction is CS2(g)+O2(g)= CO2(g)+S2O4(aq)+HEAT? A) Synthesis B) Decomposition C) Single Replacement D) Double Replacement E) Combustion F) Redox Reaction Thank You ^_^/ I really appreciate it!
  60. Chemistry

    I did the work, but I need help checking it... A compound contains 83.24% by mass carbon. Calculate the molar mass of the compound if it contains 5 moles of carbon per mole of compound. This was my process: I took 100g of compound and found that there are 83.24 g C in that ...
  61. chemistry 101

    Calculate the empirical formula for the following compound: potassium tartrate found in baking powder: 20.8% K, 2.7% H, 25.5% C, and 51.0% O
  62. Chemistry..

    A compound whose empirical formula is NO2 could have a molecular mass of what? a) 23 b)39 c)92 d)120 0 please explain and show your work.....
  63. Chemistry

    Combustion of 1g of an organic compound known to contain C, H and O produces 2.36g CO2, 0.64g H2O. What is the empirical formula?
  64. chemistry

    Calculate the empirical formula for compound ethyl butyrate (pineapple oil): C, 62.04%; H, 10.41%; O, 27.55% Can someone show me the steps?
  65. Chemistry

    A compound is 54.52% C, 9.15% H, and 36.32% O by mass. What is the empirical formula? The molecular mass of the compound is 132 amu. What is the molecular formula?
  66. chem

    a compound containing only boron, nitrogen and hydrogen was found to be 40.3% B, 52.2%N, and 7.5% H by mass. If 3.301g of this compound is dissolved in 50.00g of benzene, the solution produced freezes at 1.30 degrees celsius. If Kf(freezing point depression constant) for ...
  67. chemistry

    3. Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO₂ is also a product of the decomposition. CuCo3*Cu9OH)2 -----> 2Cuo+Co2+H2O 0.004522431 moles of malachite 0.01257071 moles...
  68. Chem! hELP

    An experiment is preformed to determin the empirical formula of a copper iodide formed by direct combination of elements. A clean strip of copper metal is weighed accurately. Its is suspended in a test tube containing iodine vapor generated by heating solid iodine. A white ...
  69. CHEMISTRY...

    1. Balance the reaction below, then use it to answer the following questions. C2H2(g)+O2(g)-->CO2(g)+H2O(l) a) How many grams of oxygen are needed to make 4.84 moles of water? Is the correct answer 387 grams of O2? b) How many grams of water will be produced from 3.0 moles ...
  70. Chemistry

    The decomposition of ozone may occur through the two-step mechanism shown below: step 1 O3 ----> O2 + O step 2 O3 + O ---> 2O2 The oxygen atom is considered to be: a catalyst or reaction intermediate? How am I supposed to be able to tell the difference between the two? I...
  71. gen chemistry

    I need help please?? Calculate the empirical formula for a compound composed of 13.27g Carbon and 70.9g sulfur. I got C1S2. Is this correct?
  72. CHEMISTRY-URGENT

    A 4.43 gram sample of phosphorus was burned in air to produce 10.15 g of an oxide. What's the empirical formula of this compound?
  73. Chemistry

    What is the empirical formula of a compound that is 14g calcium, 11g oxygen, and 0.7g hydrogen? A. CaOH B. Ca(OH)2 C. Ca2OH2 D. CaO2H
  74. Chemistry

    A compound is found to contain 63.52 % iron and 36.48 % sulfur. Find its empirical formula. FeS FeS2 Fe2S Fe2s3
  75. chemistry

    Solid sodium azide (NaN3) is used in air bags to fill them quickly upon impact. The solid NaN3 undergoes a decomposition reaction to produce Na(s) and N2(g). a. Provide the balanced equation for the decomposition of NaN3. b. What mass, in grams, of NaN3 is needed to fill the ...
  76. Chemistry

    Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to 483 K, and 3.72 ...
  77. chemistry

    Combustion analysis, Empirical and Molecular formulas, help!? When 2.686 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 9.224 grams of CO2 and 1.511 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to...
  78. READING

    Underline each compound subject once and each compound predicate twice. Then write compound subject or compound predicate. 1. swimming and softball are two sports_ in the Olympic Games.= (COMPOUND SUBJECT) 2. The swimmer's_ skill and speed made him a winner.= (COMPOUND SUBJECT...
  79. Chemistry

    I am learning the different types of chemical reactions synthesis, decomposition, single displacement, and double displacement I am also learning skeletal equations word equations and balancing the equations I know how to balance equations if I am given the formula in symbols ...
  80. CHEMISTRY A

    an unknown compound contains 85.64% carbon with the remainder hydrogen. It has a molar mass of 42.08 g/mol. Find its empirical and molecular formulas.
  81. CHEMISTRY

    1. The percent composition by mass for peroxyacylnitrate (PAN) is:19.8% C,2.5% N, and the rest is oxygen. Determine the empirical formula of this compound. ...plz i really need your help!!!
  82. Chemistry

    Hi, I posted a question yesterday : A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 of the compound produced 0.213g CO2 and 0.0310 g H20. In another experiment, it is found that 0.103g of the compound produces 0.0230 g NH3. What is the ...
  83. Chemistry

    i seriously do not understand the formula for this problem :( The reaction for the decomposition of dinitrogen monoxide gas to form an oxygen radical is: N2O(g)==>N2(g)+O(g) . If the activation energy is 250 kJ/mol and the frequency factor is 8.0 x 1011 s-1, what is the ...
  84. Chemistry

    0.05 L of chlorine gas is bubbled through 0.5 L of 2 M sodium Bromide solution. -What type of reaction is this ? A) Single Replacment B) Double Replacement C) Synthesis D) Decomposition E) Combustion - What product(s) will be predicted for this reaction? (bubble all that apply...
  85. Chemistry

    Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...
  86. Chemistry

    Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...
  87. Chemistry

    Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...
  88. chemistry

    If you had left your copper(II) nitrate/potassium hydroxide precipitate stand for a while, the precipitate would turn into a black powder. The copper doesn’t reduce in this reaction, but one mole of water is produced from the reaction of one mole of the copper precipitate. ...
  89. Science

    4g of an organic compound gave 2.34g of carbon 0.16g of hydrogen 0.46g of nitrogen 1.04g of oxygen.what is the empirical formula
  90. Chemistry

    A sample of Freon was found to contain 3.21 g of C, 19.0 g of Cl, and 10.2 g F. What is the empirical formula of this compound? C0.0352Cl0.0705F0.0705 C0.5ClF C2Cl4F4 CCl2F2 CClF
  91. Chemistry

    Silver forms a compound with nitrogen. In an experiment, 344.588 g of silver is placed in a reaction vessel with 15.906 of nitrogen. After the reaction is complete, all of the silver has been consumed, and there are 359.503 g of compound in the vessel. What is the mass of ...
  92. Chemistry check

    Can someone check to make sure my answer is correct? The question is: Which of the following statements is incorrect? a. Complete combustion has occured when all the carbon in the product is in the form of carbon dioxide. b. A single reactant is the identifying characteristic ...
  93. Chemistry

    Air bags in cars are inflated by the sudden decomposition of sodium azide (NaN3) by the following reaction. 2 NaN3(s) −→ 3 N2(g) + 2 Na(s) What volume of N2 gas, measured at 1.30 atm and 88.0◦C, would be produced by the reaction of 65.0 g of NaN3? Answer in units of L.
  94. Science

    The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound? Molar mass of CO2= 44.01 Molar mass of H20= 18.01 2.58g/44.01=0.586 mol CO2 .53g/18.01=.0294 mol H2O I Don't know where I went wrong?
  95. Chemistry

    What volume of nitrogen gas can be produced from he decomposition of 37.6 L of ammonia with both gases measured at 725 degree celsius and 5.05 pressure? In the reaction in 71 what total volume of gas at 667 celsius and 11.3 atm can be produced by the decomposition at 1.19 X 10...
  96. Chemistry

    When 442 mg of NO2 is confined to a 150. mL reaction vessel and heated to 300°C, it decomposes by a second-order process. In the rate law for the decomposition of NO2, k = 0.54 1/(M·s). A) what is the initial reaction rate? B) what is the reaction rate if the mass of NO2 ...
  97. chemistry 101

    Determine the empirical and molecular formula for a compound made from 54.09% calcium, 2.72% hydrogen, and 43.18% oxygen with a total molar mass of 222.3 g.
  98. intergrated rate law chemistry

    The decomposition of ammonia on a platinum surface at 1129 K occurs according to the following reaction: 2NH3 (g) ¨ N2(g) + 3H2(g). Use the following kinetic data which report the variation of ammonia concentration in the gas phase with time to evaluate the order of ...
  99. chemistry 102

    The following decomposition reaction SO2Cl2-->SO2 + Cl2 was run in a laboratory. Following data collected: Time(s) Pressure SO2Cl2 (ATM) 0 1 2500 .947 5000 .895 7500 . 848 10000 .803 What is the overall order of reaction?
  100. General Chemistry I

    A sample of a compound containing only Br and O reacts with an excess of H2 to give 6.601 g of HBr and 3.919 g of H2O. What is the empirical formula of this compound? a. BrO b. BrO2 c. Br2O d. BrO3 e. None of the above I already know the answer is (e), but I am not entirely ...
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