Question

Write the molecular formula of ethene and also give three succeeding members with their names.

Answer 1

The molecular formula of ethene is C2H4.

Explanation:

• The general formula for alkane is CnH2n+2. The n is the number of Carbon atoms in the molecule.  
• The 2nd member of the series is propane. The number of Carbon atoms in propane is 3. Hence the formula is C3H8
• The 3rd member of this series will have 4 carbon atoms. The name of the compound is butane and its formula is C4H10
• The fourth member has 5 carbons and its formula will be C5H12. It is called pentane.

To learn more:

1) Ethane, methane, ethene, ethyne. (in the increasing order of molecular weight)​:

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2) Define molecular formula:

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