In how many ways, you can join five carbon atoms and twelve hydrogen atoms of C₅H₁₂ ?

Write structures of different chain isomers of butane  (C₄H₁₀).

Why is petroleum called liquid gold?

What are petrochemicals?

What are gasoline additives?

What are the main constituents of LPG?

In the alkane H₃C - CH₂ -C(CH₃)₂ -CH₂ - CH(CH₃)₂, identify 1°, 2°, 3° carbon atoms and give the H atoms bounded to each one of these.

What does L.P.G. stand for?