e what is the diffrence between alkanes, alkenes and alkynes?
546716
The level of unsaturation\n\nAlkanes = all C-C single bonds\nAlkenes = at least one C=C double bond\nAlkynes = at least one C-C triple bond.
613241
Polymer is a generic term used to describe a very long molecule consisting of structural units and repeating units connected by covalent chemical bonds.  The key feature that distinguishes polymers from other molecules is the repetition of many identical, similar, or complementary molecular subunits in these chains. These subunits, the monomers, are small molecules of low to moderate molecular weight, and are linked to each other during a chemical reaction called polymerization.
542412
See number 28:\nhttp://elchem.kaist.ac.kr/jhkwak/OkanaganPdb97/molecule/alkane.htm
1068778
pure butane is neutral for sure. And butane, no matter isobutane(2-methylpropane) or just butane, is an alkane. \n\npH = -log[concentration of hydronium ions] (hydronium is H3O+), but Alkane does not dissolve in water since no ionic bond exists in the compound, so measuring its pH does not make much sense.\n\nCarbon and hydrogen have very similar electronegativity, so it's very difficult to remove hydrogen from the saturate carbon chain. alkane has pka value around 50, pKa value for water is around 16.
311555
that's bad...  Methane is CH4, propane is C3H8, and octane is C8H18... the rule to find the number of H in an alkane (single bonded Carbons) is 2N+2 where N is the number of carbon atoms... Methane is 1, ethane is 2, propane 3, butane 4, pentane 5, hexane 6, septane 7, octane 8, nonane 9, decane 10, etc....
905654
Propane is higher.  It's because C3H8 has a higher density than CH4.  There's a formula in "Perry's Chemical Engineer's Handbook" that lets you estimate the heat value of a hydrocarbon fuel, based on its density, which I don't have available right now...however, the following should be useful:\n\nhttp://cta.ornl.gov/bedb/appendix_a/Heat_Content_for_Various_Fuels.xls
1032656
C4H10\n\nCH3-CH2-CH2-CH3
930901
No they are different chemicals...;
824584
I'm only helping you because you seem to have done the rest of the questions!\n\n1. Butene is C4H8\n\n2. N and O are very close in the Periodic Table\n\n3. NaBr contains a metal and a non-metal\n\n4. Your diagrams have come out as unintelligible. Look for a molecule with a C=C double bond and no oxygen.\n\n5. CO2 contains non-metals only.\n\n6. Ethane is C2H6, and ethene is C2H4.  So they both contain 2 C atoms.\n\n17. See 3.
228602
Not three types..\nIsomers are compounds with the same molecular formulae but that are structurally different in some way. \nIt is important to be able to recognise isomers because there can have different chemical, physical properties and biological properties. \n\n\n--------------------------------------------------------------------------------\n\nConstitutional (or structural) isomers differ in the order in which the atoms are connected so they contain different functional groups and / or bonding patterns: \nexample: 1-propanol, 2-propanol and ethyl methyl ether (C3H8O) \n  \n   \n\n\n--------------------------------------------------------------------------------\n\nStereoisomers contain the same functional groups and bond connectivities, they differ only in the arrangement of atoms (or groups) in space. \n\n\n--------------------------------------------------------------------------------\n\nConformational isomers (or conformers or rotamers) are stereoisomers produced by rotation about s bonds, typically rapidly interconverting at room temperature: \nexample 1: butane : staggered (left) and eclipsed (center).The C2-C3 s bond rotation is animated (right). Try rotating the model to look along the C-C to see the two forms. \n  \n   \n\n\n  \nexample 2: cyclohexane : chair (left) and boat (right).These two forms can be interconverted by twisting the ring structure. \n  \n  \n\n\n--------------------------------------------------------------------------------\nConfigurational isomers are stereoisomers that do not readily interconvert at room temperature and can (in principle at least) be separated. In practice it may not be a simple task. \n\n\n--------------------------------------------------------------------------------\n\nGeometric isomers are configurational isomers that differ in the spatial position around a bond with restricted rotation (e.g. a double bond): \nE-2-butene and Z-2-butene \n  \n\n\n--------------------------------------------------------------------------------\n\nOptical isomers are configurational isomers that differ in the 3D relationship of the substituents about one or more atoms \n\n\n--------------------------------------------------------------------------------\n\nEnantiomers are optical isomers that are non-superimposable mirror images. \n(R)- or (S)-2-chlorobutane. Try moving the images to show that they are mirror images, and make sure you can assign their configurations correctly. \n  \n  \nR- S- \n\n\n--------------------------------------------------------------------------------\nDiastereomers are optical isomers that are not enantiomers. \n(S,R)- or (R,R)-2-bromo-3-chlorobutane. Try moving the images to convince yourself that they are not mirror images or superimposable.
809812
1.aliphatic(straight chain)\n2.aromatic(contains benzene ring)\n3.alicyclic(closed chain)
855406
alkanes are sp3 hybridized and tetrahedral. (there are single bonds between the carbons)\nalkenes are sp2 hybridized and triangular planar. (there is at least one double bond in the carbon chain)\nalkynes are sp hybridized and linear (there is at least one triple bond)\n\nwhether or not they are polar depends on their substituents. if they only have hydrogen atoms attached they will be nonpolar.
647482
-propane is a 3 carbon molecule while hexane is a 6 carbon molecule\n-cyclohexane is a 6 carbon hydrocarbon molecule in the shape of a ring. It only has single bonds - a benzene ring is a 6 carbon hydrocarbon molecule with double bonds\nIt is really just easier to draw them to show the difference though. Hard to explain in words. Differences are more apparant in drawings\n\n-Cis and trans - I think that this relates to the shape of the moelcule. \n2 methyl pentane - draw a 5 carbon molecule and tack on a one carbon molecule on the 2nd carbon of the 5 carbon molecule\n3 methyl pentane - draw a 5 carbon molecule and tack on a one carbon molecule on the 3rd carbon of the 5 carbon molecule\n- cyclo means in a circle - pentane = 5 carbon while hexane = 6 carbons\nmethane is just a one carbon molecule with all of the hydrogens filling its valence shells (4 hydrogens)\nmethyl - is a carbon with 3 hydrogens and is an appendage to the main molecule\nsaturated = the carbon has all of its 4 arms filled with hydrogens\nunsaturated = if there are double bonds then the carbon molecule is unsaturated because there are not alot of hydrogens saturating it\n\n2, 2 dimethylpentane = draw the 5 carbon pentane first - then tack on a methyl (2 carbon molecules on the 2nd carbon of the pentane)\n2, 3 dimethylpentane = draw the 5 carbon pentane first - then tack on a methyl on the 2nd and then another one on the 3rd carbon molecules of the pentane)\n\nI took chemistry a while ago so others should feel free to correct me if I am wrong on the harder molecules (cis/trans). It has something to do with conformation of the molecule.
542309
CnHnx2\n\nFor instance, the simplest alkene is ethene, or C2H4.
1160360
by molecular bonds.  covalent and ionic.
129639
a variety of hydrocarbon that has linear bond of 6 carbons and 2 nitrogen. The rest of atom is hydrogen. Its chemical formula is C6H16N2 and the structure is   \nCH3-CH2-NH-CH2-CH2-NH-CH2-CH3
726522
The correct answer would be hydrocarbons because propane, C3H8 is an alkane, Benzene, C6H6, is an aromatic hydrocarbon or a cyclic hydrocarbon, Acetylene (I'm assuming that is what you meant be Actylene), C2H2 is an alkyne, and 2-butene,C4H8, is an alkene, but all of the compounds are hydrocarbons as they only contain carbon and hydrogen.