## Question

###### The mercury content of a stream was believed to be above the minimum considered safe- 1 part per bart per billion (ppb) by weight. An analysis indicated that the concentration was 0.68 parts per billion. What quantity of mercury in grams was present in 15.0 $\mathrm{L}$ of the water, the density of which is 0.998 $\mathrm{g} / \mathrm{ml} ?\left(1 \mathrm{ppb} \mathrm{Hg}=\frac{1 \mathrm{ng} \mathrm{Hg}}{1 \mathrm{g} \text { water }}\right)$

The mercury content of a stream was believed to be above the minimum considered safe- 1 part per bart per billion (ppb) by weight. An analysis indicated that the concentration was 0.68 parts per billion. What quantity of mercury in grams was present in 15.0 $\mathrm{L}$ of the water, the density of which is 0.998 $\mathrm{g} / \mathrm{ml} ?\left(1 \mathrm{ppb} \mathrm{Hg}=\frac{1 \mathrm{ng} \mathrm{Hg}}{1 \mathrm{g} \text { water }}\right)$

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