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Parts per Million (ppm)

14. Solutions / Parts per Million (ppm) / Problem 3

The US EPA's regulatory limit for mercury (Hg) in drinking water is 2.0 ppb. A 255 L water sample was acquired from a lake and found to contain 2.3 ppb of Hg. How many grams of mercury are there in the water sample?

A

4.3×10⁻⁴ g Hg

B

6.1×10⁻⁴ g Hg

C

2.7×10⁻⁴ g Hg

D

5.9×10⁻⁴ g Hg

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