Question

Which molecule contains a total of eight carbon atoms?

4-methyl-2-octene

2-methyl-heptane

3-methyl-nonane

4-propyl-3-heptyne

Answer 1

The correct answer is 2-methyl-heptane

Step-by-step explanation:

4-methyl-2-octene

In this organic molecule there is a straight chain of 8 carbon atoms along with methyl group on the forth carbon atom.So, total carbon atom in the molecule are 9 carbon atoms.

2-methyl-heptane

In this organic molecule there is a straight chain of 7 carbon atoms along with methyl group on second carbon atom.So, total carbon atom in the molecule are 8 carbon atoms.

3-methyl-nonane

In this organic molecule there is a straight chain of 9 carbon atoms along with methyl group on third carbon atom.So,total carbon atom in the molecule are 10 carbon atoms.

4-propyl-3-heptyne

In this organic molecule there is a straight chain of 7 carbon atoms along with propyl group on forth carbon atom.So, total carbon atom in the molecule are 11 carbon atoms.

Answer 2

the molecule that contains a total of eight carbon atoms :
b. 2-methyl-heptane

formula of 2-methyl-heptane
C8H18 ( or CH3CH(CH3)CH2(CH2)3CH3 rather )

hope this help