Răspuns :

Răspuns:

MC6H6Cl6=6×12+6×1+6×35,5=291g/mol

291gC6H6Cl6..........213gCl

100gC6H6Cl6.........xg

x=100×213/291=calculează

MC4H4Cl2=4×12+4×1+2×35,5=123g/mol

123gC4H4Cl2............71gCl

100gC4H4Cl2............yg

y=100×71/123=calculează