1.

Polychlorinated biphenyls, PCBs, known to be dangerous environment pollutants , are a group of compounds with the general empirical formula C_12H_mCl_(10-m), where m is an integer. What is the value of m, if percentage of carbon atom in the compounds is 40 ?

Answer»


SOLUTION :% of CATION =`144/(144+m+36.5(10-m))xx100=40`
On SOLVING m=4


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