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The molecule you have described (C8H18) is Octane. The number of carbon atoms in the longest molecule chain give the first part of the IUPAC name.

C Atom Number - First Part

1 ---------------------Meth

2 ---------------------Eth

3 ---------------------Prop

4 ---------------------But

5 ---------------------Pent

6 ---------------------Hex

7 ---------------------Hept

8 ---------------------Oct

Type of Molecule - Suffix

Alkane ----------------ane

Alkene ----------------ene

Alcohol ----------------anol

Ketone ---------------one

Aldehyde -------------anal

Carboxylic Acid ------oic Acid

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14y ago

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