1. chemistry

    If isomers of an alkane have the same molecular formula, how do they differ?
  2. isomers molecular formula

    what are isomers that have the same molecular formula but a different arrangement of atoms called? geometric isomers, enantiomers, covalent isomers, structural isomers. They could be any of those except covalent isomers. I haven't heard of that one.
  3. Chemistry

    Choose an alkane that is 6 to 10 carbon atoms in length. List the alkane's name and the other isomers you can properly draw and name. For example: Decane / isomer 2 methyl-Nonane. Do not guess. Draw out on paper then name for best results. Include the
  4. chemistry

    why is C4H10 the simplest alkene that can have structural isomers? Because compounds wwith the same molecular formula but different structural formula are called isomers in C4H10
  5. chemistry

    The melting temperatures of the two isomers of molecular formula C2H6O are-139 °c and-115 °c. Knowing that one of the isomers is an alcohol and the other a ether, indicate the melting temperature corresponding to each of them
  6. Chemistry

    1. Which of the following compounds is an unsaturated hydrocarbon? methane *propyne nonane methyl 2. The general name for hydrocarbons with at least one triple covalent bond is ____. alkenes alkyls alkanes *alkynes 3. What is the name of the smallest
  7. Chemistry

    Write the structure for the alkane: molecular mass = 72 u; forms four monochlorination products. Well since its 72u and its an alkane, I figured out that the formula is C5H12. But what does it mean that it "forms 4 monochlorination products"?
  8. Chemistry: Please check answers

    1. Which of the following compounds is an unsaturated hydrocarbon? methane *propyne nonane methyl 2. The general name for hydrocarbons with at least one triple covalent bond is ____. alkenes alkyls alkanes *alkynes 3. What is the name of the smallest
  9. A-Level Chemistry

    How many alcohols (including both structural isomers and stereoisomers) can have the molecular formula C4H10O I know what structural and stereoisomers are but i want to know that whats the method to find the total number of isomers of this compound.
  10. chemistry

    Write the structural formula of differnt isomers gives by the molecular formula CrCl3 6H2O.
  11. Chemistry

    100 cm3 of alkane X with the general formula CxHy requires 650 cm3 of oxygen for complete combustion. Deduce the structural formulae for the isomers of X.
  12. chemistry

    name and give the molecular formula for the alkane with a molar mass of 44 g/mol?
  13. Chemistry

    The boiling point of another member of this homologous series was found to be 309 K. What is the likely molecular formula for this compound? How many carbon atoms would you expect this new compound to have if its boiling point is between that of a
  14. Chemistry

    20. What is the molecular formula for alkane, alkenes and alkynes? 15.What happens to a reaction at equilibrium when more reactant is added to the system?
  15. Organic CHEM

    I read on the textbook a sentence like this: "The melting and boiling points of alkanes increase as their molecular sizes increase. This is because as alkane molecules become bigger, the attractive forces between the alkane molecules become stronger."
  16. Organic Chemistry

    How many constitutional isomers have the molecular formula C3H6S ?
  17. chemistry

    True or false? Constitutional isomers and conformations have the same molecular formula.
  18. chemistry

    True or false? Constitutional isomers and conformations have the same molecular formula.
  19. science(chem)

    CH3CHClCH2Cl vs. CH2ClCHClCH3 How would I know if : -The two formulas represent different compounds which are constitutional isomers. -The two formulas represent different compounds that are not isomeric. -The two formulas represent the same compound. ~if
  20. chemistry

    why is C4H10 the simplest alkane that can have structural isomers?
  21. chemistry

    why is C4H10 the simplest alkane that can have structural isomers?
  22. college

    why us an alkene able to from cis/trans isomers but an alkane can't?
  23. 11th chemistry

    The chlorination of ethane gives a compound with the percent composition by mass of chlorine in the compound is 71.7% A) find the molecular formula of this compound B) write the condensed structural formulas of the isomers of this compound and give their
  24. Chemistry

    For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular formulas that differ in
  25. Chemistry

    For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular formulas that differ in
  26. Chemistry

    This is the first in a series of hw pages. If anyone would be able to help me with this one I think I would be able to complete the other 20 hw questions I have. Thanks to anyone that helps. For each definition, find a corresponding term from the following
  27. Organic Chemistry

    C5H11Cl How many possible isomers exist for this compund. I got five but the answer is 8. Is there any formula for calculating the number of isomers?
  28. Chemistry

    4 a) Write the chemical formula for the simplest pentene isomer, b) give the name of the two isomers that have pentene as the base chain, c) give the name of the three isomers that have butene as the base chain, d) give the name of the 5 chain cyclic
  29. Chemistry

    A compound of B and H is found to have a mass percent composition of 81.1% Boron. Its empirical formula is B2H5. A mass spectrometry experiment tells us that the molecular mass is 53.3 g/mol. What is its molecular formula? So I feel like this is a trick
  30. Chemistry

    a) Write the chemical formula for the simplest pentyne isomer, b) give the name of the two isomers that have pentyne as the base chain, c) give the name of the one isomer that has butyne as the base chain, d) give the name of the 5 chain cyclic isomer, e)
  31. Chemistry

    1)Define the term'geometric isomers' 2)Give geometric isomers and corresponding names for the following condensed structural formula: CH3CH2(CH)2CH3
  32. Finding the Molecular Formula

    A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound? I had some ideas as to
  33. Chemistry

    The compound butane, has two structures. They have the same molecular formula but different arrangements of bonds in their structures. As a result, they can have different chemical and physical properties. Draw the lewis structures of all the isomers of
  34. Chemistry

    Write down (a) condensed and (b) skeletal structural formulas for isomers of an organic substance whose chemical formula has 5 carbon atoms and 12 hydrogen atoms and (c) provide the common name for each of the isomers
  35. Chemistry (Organic)

    What is the molecular formula for an alkane with 12 carbon atoms? (Type your answer using the format C2H4 for C2H4.) so this problem might be easy because its the first question on my webassign but my teacher hasn't started teaching this yet but it is up
  36. chemistry

    I need to know if I have th right molecular formula for Sorbito 39.56g C 7.75g H 52.7g O Empirical Formula is CH2O 30.026 amu how I how calculate the molecular mass and how I figure out the melecular formula? please help
  37. Chemistry

    Please check my answers for the following questions. THANK YOU. 1) The empirical formula of a compound that is 25.9% nitrogen and 74.1% oxygen is.... ANSWER: N2O 2) empirical formula of a compound that consists of 4.80 grams of carbon, 1.20 grams of
  38. Chemistry Please HELP

    A 1.082 g sample of a component of the light petroleum distillate called naptha is found to yield 3.317 g CO2 and 1.584 g H2O on complete combustion This particular compound is also found to be an alkane with one methyl group attached to a longer carbon
  39. chem

    could anyone tell me why the molecular formula of agas is not always the same as the empirical formula tnx It may be a dimer or a trimer. For example, CH is the empirical formula for acetylene but the molecular formula is HC(triple bond)CH or C2H2.
  40. chemistry

    Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?
  41. chemistry

    Determining a Molecular Formula from an Empirical Formula 1. A compund has an experimental molar mass of 78g/mol. Its empirical formula is CH. What is its molecular formula?
  42. Chemistry (Check)

    True or False The empirical formula of a compound is always the same as the molecular compound. My Answear: True The empirical formula for acetylene is CH. The molecular formula is C2H2. Another example: The empirical formula for glucose is CH2O. The
  43. chem

    A molecular compound is composed of 58.8% Xe, 7.2% O, and 34.0% F, by mass. If the molecular weight is 223 g/mol, what is the molecular formula? Draw the correct Lewis structure. Predict the molecular geometry using the VSEPR model.
  44. chemistry

    For each organic compound, determine if it is an alkane, alkene, or alkyne. (No ringed structures and only one multiple bond per structure.) 1. C10H18 - alkyne 2. C15H32 - alkane 3. C20H40 - alkyne 4. C5H10 - alkene 5. C3H6 - alkene 6. C7H16 - alkane I am
  45. chemistry

    Hi, Is the molecular formula different when it is in a gaseous state? Cheers ;) Sometimes yes, sometimes no. H2O, for example, is thought to be in a group of 6 as a liquid at room temprature, a group of 4 at higher temperatures, and single H2O molecules as
  46. chemistry

    what are the 3 isomers of C2H2Cl2 what are 2 isomers of C2H3Br3, are any other isomers possible? explain.
  47. Chemistry

    I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its
  48. Chemistry

    I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its
  49. chemistry

    A compound has the following composition. C 54.5%, H 9.10% and 0 36.4% its molecular weight is 88.10. Determine its empirical formula and molecular formula. Take 100 g sample. That gives you 54.5 g C, 9.10 g H and 36.4 g O. Now convert those grams to mols.
  50. chemistry

    why is the molecular formula of oide of arsenic in its gaseous state is not neccessarialy the same as its empirical formula what does this mean and how do i do it Molecules are known to dimerize or trimerize. We actually don't know what the molecular
  51. Chemistry(the)

    An optically active compound having molecular formula C6H12O6 is found in two isomeric forms (A) and (B) in nature. When (A) and (B) are dissolved in water they show the following equilibrium. (A) Equilibrium mixture (B) D = 1110 52.20 19.20 (i) What are
  52. Chemistry

    Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure oxygen to give a product that has a mass of 1.145 g. What is the empirical formula of the resulting compound? By the use of a mass spectrometer
  53. chemistry

    An unknown sample with a molecular mass of 180.0g is analyzed to yield 40% C, 6.7% H, and 53.3% O. What is the empirical formula and the molecular formula of this compound?
  54. chemistry

    Which if the following statements concerning complex ion Co(en)2Cl2+ is true? en=NH2CH2CHNH2 A)the geometric isomers of the complex ion have identical chemical properties B) the complex ion exhibits cis an dtrans geometric isomers but no optical isomers
  55. Chemistry

    A carbohydrate P contains 40% carbon,6.67% hydrogen.If P has a relative molecular mass of 60.Determine it; 1)Empirical formula 2)molecular formula [H=1,C=12,O=16]
  56. chemistry

    Which is the molecular formula of a compound with the empirical formula BCH3 and a molecular mass of 103.38g/mole?
  57. Chemistry

    Given the Empirical formula: C6H7N, and a molecular mass of 372.52 g/mol, How do I find the MOLECULAR formula for the compound?
  58. Chemistry

    An organic compound that has the empirical formula CHO has a molecular mass of 145 amu. Its molecular formula is?
  59. Chemistry

    A compound of molecular weight 70.1 has the following composition: Carbon 85.63% and hydrogen 14.37%. What is the empirical formula? What is the molecular formula?
  60. Chem/Hydrocarbons

    Determining and naming the unique isomers of a hydrocarbon? Please help!? Hey all. I am studying a petroleum fluids class and am having difficulty in understanding one topic. Specifically, in some cases we are asked to draw and name the unique isomers of a
  61. Chemistry

    A compound has an empirical formula of CH2 and molecular mass of 84g. What is it's molecular formula?
  62. Chemistry (30s)

    I need help on this question. I can't seem to understand it. Find the molecular formula of a compound with a gram molecular mass of 30 g and an empirical formula of CH3. Please show your work! and briefly explain how you got it!
  63. chemistry

    a compound with the molecular weight of 276 grams was determined to be 39.10% carbon, 8.77% hydrogen, and 52.13% oxygen. what is the empiricial formula and the molecular formula for the compound? i do not know where to start! i worked it out and i got
  64. Chemistry re-post URGENT

    Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I
  65. Chemistry

    Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I
  66. chemistry

    In the course of research, a chemist isolates a new compound with an empirical formula C3H3O2. 4.97 g of the compound when dissolved in 100. g of water produces a solution with a freezing point of −0.325°C. What is the molecular formula of the
  67. 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
  68. 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
  69. chemistry

    Consider an isomeric mixture of alkenes of molar mass M=70g/mol. Determine the molecular formula of the alkenes. Hyrogenation of the isomeric mixture produces alkanes. What is the name of the alkane. If the alkenes in the original mixture are in equimolar
  70. Chemistry

    Write the chemical formula for the simplest heptane isomer and give its name, b) give the names of two heptane isomers with hexane as the base chain, c) give the names of names of the five heptane isomers with pentane as the base chain, d) give the name of
  71. Chemistry

    differentiate alkenes and alkynes, cis isomers and trans isomers. Describe how cis-trans isomers are used for night vision
  72. Chemistry

    Please could you tell me if I am going in the right direction. I am trying to write molecular formula for As2O3 I make molecular mass 197.8 gas density 17.8 to 3 sig figs 2.0 x density of gas at STP / density of hydrogen 17.8/0.0899 = 396 to 3 figs How do
  73. Chemistry

    What is the molecular formula of a molecule that has an em formula of CH and a molecular mass of 78.11 g/mol?
  74. Pressure and Molecular Formula

    2. How much potassium chlorate is needed to produce 20.0 mL of oxygen at 670 mm Hg and 20 degrees C. 3. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical
  75. chemistry

    A 8.408 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.53 grams of CO2 and 3.849 grams of H2O are produced. In a separate experiment, the molar mass is found to be 118.1 g/mol. Determine the empirical
  76. chemistry

    a compound with the molecular weight of 276 grams was determined to be 39.10% carbon, 8.77% hydrogen, and 52.13% oxygen. what is the empiricial formula and the molecular formula for the compound? i do not know where to start!
  77. Chemistry

    Analysis of a sample of an organic compound showed it contains 39.9%carbon,6.9%hydrogen and 53.2%oxygen. a)calculate the empirical formula b)if the relative molecular mass is 60,what is the molecular formula of the compound.(C=12,H=1,O=16)
  78. Organic Chemistry I LAB

    why would 4-methyl-2-pentanone have a lower boiling point that 2-hexanone if they are isomers and their molecular weights are the same?
  79. Chemistry

    the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula
  80. chemistry

    1. All of the following are structural isomers of CH2=CHCH2CH=CHCH3 EXCEPT a. CH2=CHCH2CH2CH=CH2 b. CH3CH=CHCH2CH=CH2 c. CH3CH=CHCH=CHCH3 d. CH2=C=CHCH2CH2CH3 Is it D? 2. Almost all of the amoino acids found in living organisms are in the L-form. L-Alanine
  81. Chemistry

    If you divide the molar mass of a compound by the empirical formula mass, what is the result? That division should be VERY close to a whole number. Usually, 0.9 to 1.1 or 1.9 to 2.1 (all depending upon the accuracy and precision of experimental data). That
  82. chemistry

    can a compound's empirical and molecular formulas be the same?Explain who cares? Yes, they can. CH4 is methane. That is the empirical formula as well as the molecular formula.
  83. Chemistry

    Explain why the melting points of ionic compounds and molecular compounds differ? The melting points of ionic compounds and molecular compounds differ because.... -A tremendous amount of energy (heat transfer) is required to separate the tightly bound ions
  84. chemistry

    Identify (give the name and the structural formula) of an alkane that has a density of 4.558 g/L at 2 atm and 37 C.
  85. Chemistry

    A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound? I had some ideas as to
  86. 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
  87. Chemistry

    The empirical formula of a compound is CH2O and the molecular mass is 180. What is the molecular formula of the compound?
  88. Molecular formula

    I have to find the molecular formula for As2O3, to do so I have to divide its molecular mass by its empirical mass. I have worked ou that its molecular mass is 197.9 g/mol. How would I find its empirical mass, is it not the same as its molecular mass? Many
  89. organic chemistry

    an alkane formula c8h18 can form only three monochlorination products give its structure
  90. 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
  91. Chemistry

    I have to answer the following questions about C3H7Cl: Are there different constitutional isomers for this formula, are there different cis/trans isomer, and are there different conformers? I know that C3H7Cl can be drawn two ways: H-C-C-C-Cl With H's
  92. Chem

    Are trans-isomers more stable than cis-isomers? i.e. do they have a higher boiling point?
  93. Organic Chemistry

    I'm looking for a site with all the pentene isomers, and all the pentyne isomers. Anyone got any suggestions?
  94. molecular formula

    a gas contains 51.7% sulfur & 51.6 percent oxygen. in a sample of gas, there is .620 g. v= 292 ml. p=806 torr. t= 378 K. what is the molecular formula. how does the % sufur & oxygen tie into all this? 51.7% S and 51.6% O gives me more than 100.0%. OOps.
  95. chemistry

    Derive the empirical formula of a hydrocarbon that on analysis gave the following percentage by mass composition: C = 85.63 % and H = 14.37 %. If the molecular mass of this compound is 56 g, derive the molecular formula.
  96. Chemistry

    Hi I got a question if we have An unknow but we have its molecular formula of that unknown compound can that Molecular formula ALWAYS tell us exactly what compound we have?
  97. Stoichiometry Test

    3.Empirical formula is C4H5N2O.Its molecular weight is 194.19g/mole.The "empirical formula weight is about 97.1g/mole.What is the molecular formula ?
  98. chemistry--help

    a compound contains 63.15% Carbon, 5.30% hydrogen, 31.55% oxygen. Its molar mass is 152.14 g/mol. determine the empirical and molecular formula. I get the empirical formula to be C8H803 is it right because it is not fitting the molecular formula because
  99. Chemistry

    i asked this question earlier and thanks to dr bob i got the empirical formula. which is C6H3O2. I need help finding the molar mass to get the molecular formula. Terephthalic acid is an important chemical used in the manufacture of polyesters and
  100. chem

    Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C, 37.51%; H, 4.20%; O, 58.29%. Calculate the empirical formula of citric acid. so i did that and got C6H8O7 but now i need to find the molecular