Amolecule of butane and a molecule of 2-butene both have the same total number of
(1) carbon atoms (3) single bonds
(2) hydrogen atoms (4) double bonds

The correct answer is option 1. Butane and 2-butene have the same total number of carbon atoms. They both have four carbon atoms. They differ in there structure since the latter has double bonds on it. As a result of the different structure, they also have different properties.

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