Explanation:
methane
CH4
CH4
—
ethane
C2H6
CH3CH3
—
propane
C3H8
CH3CH2CH3
—
butane
C4H10
CH3CH2CH2CH3
2
pentane
C5H12
CH3CH2CH2CH2CH3
3
hexane
C6H14
CH3CH2CH2CH2CH2CH3
5
heptane
C7H16
CH3CH2CH2CH2CH2CH2CH3
9
octane
C8H18
CH3CH2CH2CH2CH2CH2CH2CH3
18
nonane
C9H20
CH3CH2CH2CH2CH2CH2CH2CH2CH3
35
decane
C10H22
CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3
75
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