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Parts per million (ppm) is a common way to express small concentrations of a solute in water. a sample of tap water that is 25 ppm cl−cl− contains 25 grams of cl−cl− for every 1,000,000 grams of water. which units are numerically equal to ppm for dilute aqueous solutions?
a. μg/l
b. cg/l
c. ng/l
d. mg/l
e. g/l
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