butane

I learned that Butane is a gas molecule with four carbon atoms and ten hydrogen atoms. C4H10. And molecules combined with only carbon and hydrogen atoms are called alkanes. And an other alkane Propane C3H8. And I learned that these two gases mix under the name of LPG (liquefied petroleum gas). In cold weather conditions it must more propane and otherwise more Butane because the mixtures nature aganist iceing. For further information:

http://en.wikipedia.org/wiki/Liquefied_petroleum_gas

Ps. Is there anyone else there who do not like Jimmy Wales. I do not know why but I somehow take him like a villain in cheap Hollywood movies.