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  1. It should come from crude oil .... For more information, Fractional distillation of crude oil will give...the main component of natural gas is methane,so methane should then come from crude oil . Hoping it will be useful for you. 2007-12-29 19:36:08 補充: ...

    分類:科學及數學 > 化學 2008年01月10日

  2. ..., fat molecules contain less C=C double bonds than oil molecules, and thus fat molecules are more symmetrical in shape...

    分類:科學及數學 > 化學 2009年10月14日

  3. The density of oil is lighter than that of water, so it will flow on water. If you...

    分類:科學及數學 > 化學 2013年10月08日

  4. ... must be a solid and have a crystalline structure Obviously, oil and natural gas are not solid. 2.Minerals can be a compound or pure...

    分類:科學及數學 > 化學 2009年10月30日

  5. Oil : Let the bottle stand for some time, the oil will float on the surface. Then slowly pour the oil out. common salt: Boil the remaining waste. After all water evaporated, the salt will remain

    分類:科學及數學 > 化學 2008年10月26日

  6. Crude oil is a MIXTURE of hydrocarbons of different length. ...分開,並無將佢地駁埋或斬斷。Cracking就係將佢地斬得更短。 咁crude oil 裹面是否擁有不同的hydrocarbons呢(e.g:methane butane)? 係,但應該無...

    分類:科學及數學 > 化學 2008年05月01日

  7. 1. Both crude oil and natural gas is the fossil fuels. Natural gas such as methane...gas. Natural gas is usually used as a fuel. For crude oil , they composed of hydrocarbon molecules with longer carbon ...

    分類:科學及數學 > 化學 2008年05月14日

  8. crude oil / petroleum From wiki Petroleum (L. petroleum, from Latin: 'petra' (rock) + Latin: oleum ( oil )[1][2]) or crude oil is a naturally occurring flammable liquid ...

    分類:科學及數學 > 化學 2012年10月11日

  9. ... that the calcium chloride should be ANHYDROUS, i.e. it is dry. Oil layer in tube (III) can prevent oxygen to dissolve in the boiled water...

    分類:科學及數學 > 化學 2007年02月25日

  10. the oil coating can be considered a fuel, by conservation of energy, the more the... carbon dioxide is released under combustion. i suggest oil reacts with fragrance at high temperature

    分類:科學及數學 > 化學 2007年04月13日