BHC (benzene hexachloride) is made by adding chlorine to benzene in sunlight: C6H6 + 3Cl2 -> C6H6Cl6. Its molecular formula and use are

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BHC (benzene hexachloride) is made by adding chlorine to benzene in sunlight: $C X_{6} H X_{6} + 3 Cl X_{2} C X_{6} H X_{6} Cl X_{6}$ . Its molecular formula and use are

The equation is balanced with 6 C, 6 H and 6 Cl on each side, so BHC is

C X_{6} H X_{6} Cl X_{6}

, an organochlorine insecticide.

C X_{14} H X_{9} Cl X_{5}

is the formula of DDT.