Question

A molecule 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

Answer 1

1) same amount of carbon atoms.

That is why it is still called butane and butene.
but- always signifies 4 carbons

Answer 2

Answer: Option (1) is the correct answer.

Step-by-step explanation:

A hydrocarbon that contains only single bonds is known as alkane. Their general formula is
`C_(n)H_(2n+2)`, where n is the number of carbon atoms.

For example, butane (
`CH_(3)CH_(2)CH_(2)CH_(3)`) is an alkane.

Whereas a hydrocarbon that contains at least one double bond is known as an alkene. Their general formula is
`C_(n)H_(2n)`.

For example, 2-butene (
`CH_(3)CH=CHCH_(3)`) is an alkene.

Hence, there are same number of carbon atoms in both butane and 2-butene.