Calculate the concentration in parts per million (ppm) of ddt if a sample size of 2000 g contained 0.050 g ddt

= 25 ppm

Explanation:

Given; a sample size of 2000 g contained 0.050 g DDT

It means, 2000 mL sample contained 50 mg DDT

Therefore in ppm we get;

= 50 mg/ 2 L

= 25 mg/L

= 25 ppm

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