Problem: The toxicity of DDT (C14H9Cl5) led to a ban on its use in the United States in 1972. Determinations of DDT concentrations in groundwater samples from Pennsylvania between 1969 and 1971 yielded the following results: Express these concentrations in millimoles per liter for:a) Orchard b) Residential c) Residential After a Storm 

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The toxicity of DDT (C14H9Cl5) led to a ban on its use in the United States in 1972. Determinations of DDT concentrations in groundwater samples from Pennsylvania between 1969 and 1971 yielded the following results:
 

Express these concentrations in millimoles per liter for:

a) Orchard 

b) Residential 

c) Residential After a Storm 



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