Question

an alkane with molecular weight 86 what will be its physical state and molecular formula? Why do we take 12 n? In answer please explain

Answer 1

Answer:

The molecular formula of the alkane is C

n

H

2n+2

It's molecular weight is 12n+2n+2=14n+2=86.

14n=84

n=6

Hence, the molecular formula of alkane is C

6

H

14

. Since, it gives only two monobromination products, the compound must be 2,3-dimethylbutane.