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cine imi afla si mie compozitia procentual la DICLORMENTAN

Răspuns :

MCH2Cl2=12+2+71=85g/mol
85g.......100%
12g (C)...x
2g (H).....y
71g (Cl)...z
x=14.11% carbon
y=2.35% hidrogen
z=83.54% clor