Question

An alkane has molecular mass 86 . what is the molecular formula of the alkane . write down all the possible isomers for this molecular formula ?

Answer 1

let the formula of the alkane be CnH2n+2

Therefore we have

12n + 1(2n+2) = 86

12n +2n+2=86

14n = 84

n=6

i.e the formula of the given alkane is C6H14 !

following are its possible isomers :

n-hexane

2-methyl pentane

3-methyl pentane

2,2 dimethyl butane

Answer 2

✌️✌️hey mate


➡️let the formula of the alkane be CnH2n+2

Therefore we have

12n + 1(2n+2) = 86

12n +2n+2=86

14n = 84

n=6

✔️i.e the formula of the given alkane is C6H14..

➡️following are its possible isomers :

•n-hexane

•2-methyl pentane

•3-methyl pentane

•2,2 dimethyl butane


thanks..
nice to help you ✌️✌️