which two elements are present in hydrocarbons?
958526
theres a clue in the name
1068373
If you know you're dealing with an organic compound, you take the formula weight and divide by 12.  This gives the number of carbon atoms.  You look at the remainder and determine if it could be the number of hydrogen atoms.  Alkanes have 2n + 2 hydrogen atoms (where n = number of carbons).  Alkenes have 2n and alkynes have 2n - 1.
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3 elements:\n\nOxygen, heat, & fuel.
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CH2Cl2\nThe molecule shape is tetraedric with the carbon in the middle
191936
dioxygen is the most common molecule that contains oxygen.  \ncarbon dioxyde, for example has two oxygens and one carbon molecule.
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1 Hydrogen 2 Helium 3 Lithium 4 Beryllium 5 Boron. 6 Carbon 7 Nitrogen 8 Oxygen 9 Fluorine 10 Neon
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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.
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....
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These answers are all correct yet incomplete.\n\nFor complete combustion of a hydrocarbon (the major components of gasoline are hydrocarbons), the products are water and carbon dioxide.\n\nHowever, combustion in the everyday use of gasoline is not necessarily complete, and the products due to incomplete combustion of a hydrocarbon are water and carbon monoxide.\n\nAlso, in theory, the combustion occurs when oxygen and hydrocarbon are chemcally reacted with each other.  However, in practice, the oxygen supply comes from air, which is predominantly nitrogen, and the heat of combustion will contribute to the combustion of the nitrogen.  The products of combustion of nitrogen are NO2 and NO3, commonly known as NOx.\n\nThe main fact left out in the previous answers, are that gasoline is not solely composed of hydrocarbons.  In addition to the fuel additives, which are predominantly formed from carbon, hydrogen, and oxygen, there are also sulfur-containing organic compounds that are considered impurities (ie, could not be removed during the refining process).  The products of the combustion of these sulfur-containing compounds are carbon dioxide, carbon monoxide, water, and SO2 and SO3, commonly called SOx.\n\nCombustion of gasoline will also have particulate matter as a byproduct. Is is similar to smoke you see when burning any fuel.  Incomplete or inefficient combustion can lead to small amounts of carbon not being oxidized, leaving carbon dust, or coke, as a product.  This dust can also be a carrier for other pollutants or by-products and depending upon particle size, can be very harmful to human respiratory health.\n\nFinally, since some of the fuel may not be completely combusted, volatile organic compounds, or VOCs, will be products as well.
170202
basically hydrogen and carbon since they belong to a group called hydrocarbons.
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The general formula for alkanes is CnH2n+2
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it is a mixture of hydrocarbons containing few carbons. octane is one constituent
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A compound contains more than one element (H2O).  A molecule may contain atoms of one element only (O2).
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Hydrocarbons are good nonpolar molecules.
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Petroleum fuels are made of Hydrocarbons (molecules made up out of Hydrogen and Carbon).  When you combust/burn a Hydrocarbon in excess Oxygen you produce Carbon Dioxide and Water (incomplete combustion also produces Carbon Monoxide).\n\nTake gasoline for instance, mostly Octane (C8H18), the reaction shown below is the complete cobustion reaction which occurs,\n2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O\nThe fuel is chemically changed into Carbon Dioxide (which is not considered a fuel) and Water.  If we assume complete combustion, there is no fuel left over.\n\nIf you were to split up the Carbon Dioxide (or in your case CO that is produced through incomplete combustion), you will obtain elemental Carbon and Oxygen gas.  Carbon could be considered a fuel since it could then undergo further combustion with Oxygen however, it is not a Hydrocarbon fuel since it has no Hydrogen (all the Hydrogen went into water).
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Water. Water contains two hydrogens and one oxygen. It's technical name should be dihydrogen monoxide, but we knew about water before chemistry was officially developed.
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Well, most elements are important to the human body and industry.\n\nTake carbon (C) for example.  Carbon is the quintessential element of organic chemistry, and therefore life itself!  But carbon finds numerous applications in industry, from carbon steel to plastics (which are composed of carbon based polymers) to the gasoline that you put in your vehicle.