A copoymer of ethene and vinyl chloride contains alternate monomers fo each type.What is the ,mass percentage of viny chloride in this copolymer?

Options

A. `38%`
B. `69%`
C. `72%`
D. `82%`

Answer

B

Explanation

The structure of copolymer ot ethene and vinyl chloride is shown below
`(CH_(2)underset"Ethene" = CH_(2)) + n(CH_(2)underset"vinyl chloride" = CHCl)`

Molecular weight of ethene `(CH_(2)CH_(2)) = 28`
Moleclar weight of vinyi chloride `(CH_(2)CHCl) = 62.5`
Emprical formula weight of copolymer = 28 + 62.5 = 90.5
Mass% of vinyl chloride in the copolymer = `(62.5xx100)/90.5= 69.06~~ 69%`