1. Chemistry

    1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin? How would I find this? 2)The gram molecular mass of oxygen is 16.0 g right? 3)How would I find the mass, in grams, of 3.01 x 10^23 molecules of water? 1. Add the atomic

    asked by anonymous on July 31, 2007
  2. Chemistry II

    C4H4 (g) + 2 H2 (g) --> C4H8 (g) Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341

    asked by Jayd on May 20, 2007
  3. Chemistry

    The temperature rises from 25.00 °C to 29.00 °C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ÄErxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/°C

    asked by Emma on December 6, 2012
  4. Chemistry

    A particular metallic element, M, has a heat capacity of 0.36 J*g*K, and it forms an oxide that contains 2.90 grams of M per gram of oxygen. (a) Using the law of Dulong and Petit (Cp x M = 25 J*mol*K), estimate the molar mass of the metal M [Answer: _____

    asked by . on October 29, 2009
  5. chemistry

    2CH3OH(l)+3O2(g)→2CO2(g)+4H2O(g Part B Calculate the standard enthalpy change for the combustion of 1 mol of liquid methanol, assuming H2O(g) as a product. Part C Calculate the heat produced by combustion per liter of methanol. Methanol has a density of

    asked by how do i even start this? on October 30, 2014
  6. Chemistry

    Are my answers correct? C6H14 + 19/2 O2 -> 6 CO2 + 7H2O enthalpy change = -4163 kJ a) if 0.537 mol of carbon dioxide is produced in the reaction represented by the equation above, how much heat is released by the reaction? Enthalpy change = 0.537 mol CO2 x

    asked by A Canadian on February 10, 2013
  7. Chemistry

    The standard heat of combustion of eicosane, C20H42 (s), a typical component of candle wax, is -1.332 x 104 kJ/mol (consider this number to be exact in your calculations), when it burns in pure oxygen, and the products are cooled to 25°C. The only

    asked by Anonymous on March 23, 2015
  8. Chemistry

    C2H5OH(l) + 3 O2(g) -> 2 CO2(g) + 3 H2O(g) During an experiment 10.00 g of ethanol is completely burned in air to release CO2(g) and H2O(g) as shown in the equation above. During the combustion, 296.6 kJ of heat energy is released. What is the molar

    asked by Anonymous on March 27, 2015
  9. chemistry

    Find the mass in grams. a. 4.30 x 10^16 atoms He, 4.00 g/mol b. 5.710 x 10^23 molecules CH4, 16.05 g/mol c. 3.012 x 10^24 ions Ca^2+, 40.08 g/mol

    asked by jaz on March 16, 2009
  10. Chemistry

    A quantity of 1.435g of naphthalene (C1oHs), a pungent-smelling substance used in moth repellents, was burned in a bomb calorimeter (constant volume). Consequently, the temperature of the water rose from 20.17°C to 25.84°C. If the mass of the water

    asked by Anonymous on September 30, 2018
  11. Chemistry

    Study the balanced equation. C + O2 → CO2 (M O2 = 32 g/mol; M CO2 = 44 g/mol) When 78.0 g of carbon dioxide (CO2) are produced, what mass of oxygen is present in the product? 56.7 g oxygen 35.0 g oxygen 52.3 g oxygen 28.4 g oxygen I do not believe it is

    asked by Auzy on December 17, 2019
  12. chem hwk

    a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns

    asked by wll.i.am on January 24, 2013
  13. chemistry

    The normal boiling point of liquid butanol is 391 K. Assuming that its molar heat of vaporization is constant at 45.9 kJ/mol, the boiling point of C4H9OH when the external pressure is 0.647 atm is

    asked by Anonymous on December 1, 2017
  14. chemistry

    1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns completely, how many grams of 1-butanol have burned? grams =33.1 bu then

    asked by wll.i.am on January 25, 2013
  15. Chemistry

    Pentaborane-9, BsHs, is a colorless, high reactive liquid that will burst into flame or even explode when exposed to oxygen The reaction is 2 BsH9()12 02(g)5 B0 (s)+9 H20 (I) Pentaborane-9 was considered as a potential rocket fuel in the 1950s because it

    asked by Anonymous on September 30, 2018
  16. Chemistry

    When 2 mol of solid magnesium (Mg) combines with 1 mole of oxygen gas (O2), 2 mol of solid magnesium oxide (MgO) is formed and 1204kJ of heat is released. Write the thermochemical equation for this combustion reaction.

    asked by Kim on May 19, 2010
  17. Chemistry

    Which of the two, benzoic acid and sucrose, has the largest heat of combustion and why? Can you look up the heats of combustion. I found -3226.9 kJ/mol for benzoic acid and -5637 kJ/mol for sucrose but you should look for yourself and confirm those

    asked by Amy on March 26, 2007
  18. Chemistry

    Hydrogen and methanol (CH3OH) have both been proposed as alternatives to hydrocarbon fuels. a) Write balanced chemical equations for the complete combustion of hydrogen and the complete combustion of gaseous methanol. Combustion reaction for hydrogen:

    asked by Jarrod on November 4, 2010
  19. Chemistry

    A 2.612 g sample of a copper oxide, when heated in a stream of H2 gas, yields .592 g H20. What is the formula of the copper oxide? Again, I need help with this problem. Answer = CuO Ok nvm.. i got it. Set up the reaction as best we can surmise at the

    asked by Laura on August 25, 2005
  20. Chemistry

    "Given that the bond enthalpy of the carbon-oxygen bonds in carbon monoxide and carbon dioxide are 1073 kJ/mol and 743 kJ/mol respectively, and that of the bond in the oxygen molecule is 496 kJ/mol, calculate the enthalpy change for the combustion of 1

    asked by Stuck on April 8, 2010
  21. Chem

    Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H2O formed. (Enter in kJ.)

    asked by Martin on October 23, 2014
  22. C hemistry

    An unknown compound contains only carbon, hydrogen, and oxygen . Combustion of 2.50 g of this compound produced 3.67 g of carbon dioxide and 1.50 g of water. What is the empirical formula of a substance that contains 8.33×10−2 mol of carbon, 0.167 mol

    asked by isoka on September 26, 2010
  23. AP Chemistry

    If the heat of combustion of 1-butanol (C4H9OH) is 2,710 kJ/mol, what mass of oxygen is consumed when enough 1-butanol is burned to yield 26,400 kJ of energy? I have no clue where to begin I thought to use enthalpy but it didnt work

    asked by Blake on December 5, 2017
  24. chem

    a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns

    asked by wll.i.am on January 24, 2013
  25. chemistry

    when a 8.77g mixture of methane, and ethane is burned in oxygen at constant pressure, 476.6kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3kJ/mol and

    asked by Anonymous on November 22, 2010
  26. Chemistry

    Calculate the empirical formula and molecular formula of a compound that contains only carbon, oxygen and hydrogen and has a molecular mass of approximately 90. g/mol. Upon combustion of 12.0g of the compund with an excess of oxygen, the yield was 1.2 g of

    asked by Anonymous on April 22, 2010
  27. Chem

    The combustion of hydrogen with oxygen is used to produce extremely high temperatures needed for certain types of welding procedures. What is the quantity of heat generated, in kj, when a 180g mixture containing equal parts oxygen and hydrogen gasses by

    asked by carolin on May 7, 2015
  28. chem

    Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2755 kJ/mol), and H2

    asked by mel on November 27, 2007
  29. chemistry

    Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2766 kJ/mol) and H2

    asked by Lux on December 28, 2010
  30. Chemistry

    Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

    asked by Justin on November 8, 2015
  31. Chemistry

    Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

    asked by Justin on November 8, 2015
  32. Chemistry

    Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

    asked by Justin on November 8, 2015
  33. Chemistry

    Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the

    asked by Lana on January 14, 2016
  34. AP Chemistry

    If the heat of combustion of 1-butanol (C4H9OH) is 2,710 kJ/mol, what mass of oxygen is consumed when enough 1-butanol is burned to yield 26,400 kJ of energy? I have no clue where to begin I thought to use enthalpy but it didnt work

    asked by Blake on December 5, 2017
  35. college chemistry

    An electrical heater is used to add 19.50 kJ of heat to a constant-volume calorimeter. The temperature of the calorimeter increases by 4.50°C. When 1.75 g of butanol (C4H9OH) is burned in the same calorimeter, the temperature increases by 14.58°C.

    asked by jojo on October 16, 2010
  36. chemistry

    Use the following information to find Hf of butanol [C4H9OH(l)]. C4H9OH(l) + 6 O2(g) 4 CO2(g) + 5 H2O(g) Hcomb = -2712.9 Hf of CO2(g) = -393.5 kJ/mol Hf of H2O(g) = -241.8 kJ/mo

    asked by mara on October 23, 2015
  37. chemistry

    A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(g °C). As a result of the reaction, the temperature of the calorimeter increases from

    asked by sean on August 22, 2013
  38. Chemistry - Stoichiometry/gases

    When 2.38 g of methane burns in oxygen, 119 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions? Your answer will be in kJ/mol. the Molar Mass of methane is 16.04, so I did 2.38g/16.04=0.14838 mol

    asked by Jamie on July 23, 2017
  39. chemistry

    Calculate the mass of ethanol that must be burnt to increase the temperature of 150g of water by 75 degrees celsius, if exactly 75% of the heat released by this combustion is lost to the surroundings. Also it is given that the heat of combustion of ethanol

    asked by Isabella on February 7, 2015
  40. Chem

    A 2.461-g sample of glutamic acid, C5H9NO4 (147.13 g/mol) was burned in a bomb calorimeter with excess oxygen. The temperature of the calorimeter and the water before combustion was 23.76 °C; after combustion the calorimeter and the water had a

    asked by Anthony on October 28, 2017
  41. chemistry

    From the following combustion: 1-butanol + oxygen+ carbon dioxide + water. How many grams of carbon dioxide and water are produced when 130.6 grams of 1-butanol is completely burned? I wrote out the equation and got C4H10) + 02= CO2 + H2O. i balanced the

    asked by Turtle Lover on November 29, 2009
  42. Chemistry help (DrBob222)

    propane (c3h8) is burned in oxygen to produce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are react with 10.0 mol O2? Thanks, and please if possible show all steps!

    asked by K on October 15, 2013
  43. AP chemistry

    Propane (C3H8) is burned in oxygen to pro- duce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are reacted with 10.0 mol O2?

    asked by desdemona on November 26, 2011
  44. science

    Hi, quick question: Graphite is burned in oxygen to give carbon monoxide and carbon dioxide. If the product mixture is 33% CO and 67% CO2 by mass, what is the heat from the combustion of 1.00 g of graphite? dH values: CO:-110.5 kj/mol, CO2: -393.5 kj/mol

    asked by ben on November 24, 2009
  45. Chemistry

    A sample of acetone having a mass of 1.920 g undergoes complete combustion in an insulated calorimeter holding 400 mL of water. It is determined that the water and calorimeter together absorb 58.829 kJ of heat energy from this combustion. Based on this

    asked by lomonoyan on October 15, 2016
  46. Chemistry

    A 2.461-g sample of glutamic acid, C5H9NO4 (147.13 g/mol) was burned in a bomb calorimeter with excess oxygen. The temperature of the calorimeter and the water before combustion was 23.76 °C; after combustion the calorimeter and the water had a

    asked by Genevieve on February 27, 2019
  47. Chemistry

    In a laboratory activity, a student team measures the heat released by burning heptane. Using the following data, calculate the molar heat of combustion of heptane in kJ/mol: Mass of water - 179.2 g Initial water temperature - 11.6 degrees C Final water

    asked by Natasha on April 21, 2008
  48. Molar heat of combustion question!

    Calculate the molar heat of combustion of paraffin, expressed in units of kJ/mol. First calculate the thermal energy released when one mole of parafin burns) because one mole of parafin (c25h52) has a mass of 325g, the molar heat of combustion will be 352

    asked by Allyson on February 5, 2013
  49. chemistry

    When a 6.79-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 369 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1

    asked by abby on March 1, 2014
  50. chemistry

    While researching energy values of fuels, a chemist designed an experiment to find out the heat of combustion of pentane. Using the known hexane heat of combustion of hexane = 4650kJ/mol and the data below calculate the heat of combustion of pentane. Set

    asked by sarah on March 28, 2010
  51. chemistry

    While researching energy values of fuels, a chemist designed an experiment to find out the heat of combustion of pentane. Using the known hexane heat of combustion of hexane = 4650kJ/mol and the data below calculate the heat of combustion of pentane. Set

    asked by sarah on March 28, 2010
  52. Chemistry

    An structural isomer of bromobutane (C4H9Br) can be hydrolysed using aqueous sodium hydroxide to produce butanol. This can be represented by the following equation: C4H9Br(l) + OH-(aq)  C4H9OH(l) + Br-(aq) This reaction was investigated experimentally

    asked by JJ on April 5, 2012
  53. Chemistry

    How many kcal of heat energy are required or released when 1.73 moles of butanol , C4H9OH, is warmed from -175.8 degrees F to 360.9 degrees F? The following information concerning butanol applies: normal melting point: 12.5 degrees C normal boiling point:

    asked by Garret on September 30, 2007
  54. Chemistry

    If the heat of combustion for a specific compound is -1080.0 kJ/mol and its molar mass is 58.29 g/mol, how many grams of this compound must you burn to release 300.60kJ of heat?

    asked by Patricia on October 29, 2013
  55. Chemistry

    If the heat of combustion for a specific compound is -1010.0 kJ/mol and its molar mass is 46.03 g/mol, how many grams of this compound must you burn to release 388.00 kJ of heat?

    asked by Anonymous on March 27, 2013
  56. chemistry

    If the heat of combustion for a specific compound is -1310.0 kJ/mol and its molar mass is 75.45 g/mol, how many grams of this compound must you burn to release 708.60 kJ of heat?

    asked by :) on October 21, 2012
  57. chemistry

    If the heat of combustion for a specific compound is -1180.0 kJ/mol and its molar mass is 40.91 g/mol, how many grams of this compound must you burn to release 114.50 kJ of heat?

    asked by anon on October 28, 2016
  58. Chemistry (balance)

    if the heat of combustion for a specific compound is -1320.0 KJ/mol and its molar mass is 67.53 g/mol how many grams of this compound must you burn to release 791.60 kj of heat

    asked by Jacob on August 20, 2012
  59. Chemistry

    If the heat of combustion for a specific compound is -1250.0 kJ/mol and its molar mass is 35.39 g/mol, how many grams of this compound must you burn to release 352.40 kJ of heat?

    asked by Robert on April 11, 2016
  60. chem

    If the heat of combustion for a specific compound is -1160.0 kJ/mol and its molar mass is 90.75 g/mol, how many grams of this compound must you burn to release 823.00 kJ of heat?

    asked by rachel on March 20, 2018
  61. Chem

    If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 42.75 g/mol, how many grams of this compound must you burn to release 191.90 kJ of heat?

    asked by Anonymous on July 13, 2014
  62. chemistry

    If the heat of combustion for a specific compound is -1460.0 kJ/mol and its molar mass is 55.75 g/mol, how many grams of this compound must you burn to release 900.20 kJ of heat?

    asked by catey on April 5, 2012
  63. Chemistry

    If the heat of combustion for a specific compound is -1320.0 kJ/mol and its molar mass is 92.41 g/mol, how many grams of this compound must you burn to release 544.30 kJ of heat?

    asked by Anonymous on October 9, 2012
  64. ap chemistry

    Propane (C3H8) is burned in oxygen to pro- duce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are reacted with 10.0 mol O2? 1. 4024 kJ 2. 2012 kJ 3. 916 kJ 4. 1555 kJ 5. 5122 kJ

    asked by cheri on October 31, 2012
  65. chemistry

    From the following combustion: 1-butanol + oxygen = carbon dioxide + water. How many grams of carbon dioxide and water are produced when 130.6 grams of 1-butanol is completely burned? Please help me! I have not a clue! Thanks so much!

    asked by Turtle Lover on November 28, 2009
  66. Chemistry

    C6H14 + 19/2 O2 -> 6 CO2 + 7H2O delta H = -4163 kJ What mass of hexane is required to produce 1.0E5 kJ of heat by complete combustion? -4163 kJ/mol x mol C6H14 = 1E5/-4163 kJ/mol Mol = 1E5/-4163 kJ/mol Mol = -24 mol I know I can do m=n x MM now, but

    asked by A Canadian on February 11, 2013
  67. chemistry

    A sample of 1.150 g of sucrose (342.3 g mol-1) undergoes combustion in a bomb calorimeter. If the temperature rises by 4.22 °C and the heat capacity of the calorimeter assembly (including the water) is 4.90 kJ °C-1, what is the heat of combustion of

    asked by ndabenhle on September 21, 2019
  68. chemistry

    A calorimeter consists of an interior metal bomb (container) surrounded by 2.22 kg of water all contained within an insulated exterior wall. A sample of propane, C3H8, weighing 6.89g, was burned in the calorimeter with excess oxygen. As a result of the

    asked by Anonymous on July 16, 2008
  69. Chemistry

    If the heat of combustion for a specific compound is -1060.0 kJ/mol and its molar mass is 58.31 g/mol, how many grams of this compound must you burn to release 589.10 kJ of heat? I don't understand even how to begin this question, so can you walk it step

    asked by Peter on October 10, 2018
  70. Chem

    The combustion of hydrogen with oxygen is used to produce extremely high temperatures needed for certain types of welding procedures. What is the quantity of heat generated, in kj, when a 180g mixture containing equal parts oxygen and hydrogen gasses by

    asked by carolin on May 6, 2015
  71. Chemistrey

    Problem: What is the heat capacity of the newly assembled oxygen bomb calorimeter? Experimental design: An oxygen calorimeter is assembled and several samples of the primary standard, benzoic acid are burned using a constant pressure of excess oxygen. The

    asked by Calorimeter on April 4, 2007
  72. Chemistry

    A particular metallic element, M, has a heat capacity of 0.36 J*g*K, and it forms an oxide that contains 2.90 grams of M per gram of oxygen. (a) Using the law of Dulong and Petit (Cp x M = 25 J*mol*K), estimate the molar mass of the metal M [Answer: _____

    asked by . on October 22, 2009
  73. chemistry

    Assuming the molor mass of paraffin is 280 g/mol, calculate the # of mols of paraffin burned. Then calculate the heat of combustion of paraffin in kJ/mol I don't think I can help you with the information provided. We need an equation (although we can wing

    asked by dan on September 26, 2006
  74. Chemistry- Dr.Bob!

    Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the

    asked by Lana on January 13, 2016
  75. Chemistry

    Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the

    asked by Lana on January 13, 2016
  76. Chemistry

    A 1.76g sample of quinone, C6H4O2, is burned in a calorimeter whose total heat capacity is 7.854 kJ/C. The temperature of the calorimeter increases from 23.44 C to 29.14 C. What is the heat of combustion per mole of quinone? The molar mass of quinone is

    asked by Haley on May 20, 2015
  77. Chemistry

    Rates of reaction, redox reactions? 10 points? An structural isomer of bromobutane (C4H9Br) can be hydrolysed using aqueous sodium hydroxide to produce butanol. This can be represented by the following equation: C4H9Br(l) + OH-(aq) > C4H9OH(l) + Br-(aq)

    asked by Local on March 30, 2012
  78. Chemistry

    Chemistry HELP - Rates of reaction, redox reactions? 10 points? An structural isomer of bromobutane (C4H9Br) can be hydrolysed using aqueous sodium hydroxide to produce butanol. This can be represented by the following equation: C4H9Br(l) + OH-(aq) >

    asked by Lola on March 27, 2012
  79. Chemistry

    At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)?

    asked by Raul on March 22, 2013
  80. Chemistry

    A 0.003913 mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.1 °C to 25.7 °C. If the heat capacity of the calorimeter is 4.24 kJ (°C)−1, then what is the constant volume

    asked by Jean on February 2, 2020
  81. Chemistry

    The heat of combustion of carbon is -393.5kj/mol. Calculate the heat change, when 45.0g of carbon undergoes complete combustion given that c =12

    asked by OKO ORU on October 21, 2019
  82. chemistry

    A 0.009298-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 27.1oC. If the heat capacity of the calorimeter is 4.84 kJ (oC)-1, then what is the constant volume heat of

    asked by Sasha on November 3, 2014
  83. Chemistry

    A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(g°C). As a result of the reaction, the temperature of the calorimeter increases from

    asked by Timmy on July 8, 2013
  84. O CHEM - dr. bob

    1. What is the maximum volume (at STP) of the butene mixture that could be obtained by the dehydration of 81 mg of 2-butanol? 2. When 2-methylpropene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has

    asked by Dora on January 7, 2009
  85. Organic Chemistry- help Dr. Bob

    1. What is the maximum volume (at STP) of the butene mixture that could be obtained by the dehydration of 81 mg of 2-butanol? 2. When 2-methylpropene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has

    asked by dora on January 7, 2009
  86. chem

    The heat of combustion of methane is 213 kcal/mol. How many kcal of energy are released when 22.5 moles of CH4 burns in an excess of oxygen gas?

    asked by banana on March 11, 2016
  87. chemistry

    A 0.016076-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 24.5oC. If the heat capacity of the calorimeter is 4.98 kJ (oC)-1, then what is the constant volume heat of

    asked by abby on March 1, 2014
  88. chemistry

    A 0.016076-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 24.5oC. If the heat capacity of the calorimeter is 4.98 kJ (oC)-1, then what is the constant volume heat of

    asked by abby on March 5, 2014
  89. chem

    At constant volume, the heat of combustion of a particular compound is –3209.0 kJ/mol. When 1.829 g of this compound (molar mass = 159.29 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 6.753

    asked by Anonymous on July 13, 2014
  90. Chemistry

    At constant volume, the heat of combustion of a particular compound is –3949.0 kJ/mol. When 1.331 g of this compound (molar mass = 141.44 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 3.837

    asked by meg on February 23, 2015
  91. Chemistry

    At constant volume, the heat of combustion of a particular compound is –3547.0 kJ/mol. When 1.239 g of this compound (molar mass = 196.58 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 8.539

    asked by Jessica on June 18, 2013
  92. chemistry

    At constant volume, the heat of combustion of a particular compound is –3334.0 kJ/mol. When 1.569 g of this compound (molar mass = 125.76 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 5.173

    asked by Ag10 on November 28, 2012
  93. chemistry

    At constant volume, the heat of combustion of a particular compound is –3323.0 kJ/mol. When 1.489 g of this compound (molar mass = 131.02 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 8.077

    asked by Brianna on February 6, 2013
  94. chemistry

    At constant volume, the heat of combustion of a particular compound is –3947.0 kJ/mol. When 1.311 g of this compound (molar mass = 136.58 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 4.343

    asked by anon on October 28, 2016
  95. chemistry

    At constant volume, the heat of combustion of a particular compound is –3599.0 kJ/mol. When 1.365 g of this compound (molar mass = 102.90 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 7.819

    asked by brianna on October 27, 2013
  96. Chemistry

    The complete combustion of 0.100 mol of CH4 in oxygen in a bomb calorimeter caused the water of the calorimeter to rise in temperature from 25.00 degrees Celsius to 37.70 degrees Celsius. Suppose that the combustion of the 0.1 mol of CH4 was instead run at

    asked by HELP!!! on February 6, 2009
  97. physics

    A mass of 710 kg is located at the origin. A second mass, 44.0 kg, is located at the point (0.216,0.702) m. Find the magnitude of the gravitational force on the 44.0 kg mass due to the 710 kg mass at the origin. I got: 3.86×10-6 N Enter the x and y

    asked by Marc on April 28, 2012
  98. Chemistry

    Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H2O formed. (Enter in kJ.)

    asked by Kales on October 23, 2014
  99. Chemistry

    The heat of combustion of methane is -890 kj per mole. How much heat will be produced in the combustion of 6.25 mol of methane?

    asked by Anonymous on May 22, 2014
  100. Chemistry

    Note- I do not want the answers. I just need to know how to set up each.. The combustion of isopropyl alcohol (Molar Mass=60.1 g/mole) is described by the following balanced equation: 1 C2H8O + 9 O2 (g) -> 6 CO2 (g) 8H2O (l) + 4012 kJ of heat energy a) How

    asked by Hanna on October 26, 2016