A gas has molecular formula (CH)_n.If vapour density of the gas is 39, what should be the formulaof the compound ?

A gas has molecular formula (CH)_n.If vapour density of the gas is 39,

1.	A gas has molecular formula (CH)_n.If vapour density of the gas is 39, what should be the formulaof the compound ?
Answer» `C_3H_3` `C_4H_4` `C_2H_2` `C_6H_6` Solution :Mol. Wt. `=2xxV.D. = 2xx39=78` `(CH)_n=(13)_n " or " 13xxn=78` N=78/13=6 `therefore " MOLECULAR formula " = C_6H_6`