the-maximum-allowable-concentration-of-lead-in-drinking-water-is-9-0-ppb-b-how-m

Question

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?

Accepted Answer

5.9×$$10^{−4} g Hg$$

Answer

4.3×$$10^{−4} g Hg$$

Answer

6.1×$$10^{−4} g Hg$$

Answer

2.7×$$10^{−4} g Hg$$