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1) According to a health report, the world wide average silver concentrations in natural waters are...

1) According to a health report, the world wide average silver concentrations in natural waters are 0.2–0.3 mcg/liter. In the US, concentrations can reach 5 mcg/liter. Determine the concentration in ppb (nearest tenth) for a water sample that contains 4.5 mcg per 0.5 liter.

2) According to the EPA, the maximum allowable concentration of nitrate in drinking water is 0.01 g per liter. What is the ppm concentration (two decimal places) of a water sample that contains 7 mg of nitrate in 1000 mL

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Homework Answers

Answer #1

We know that,

1mcg = 1×10-6 g

And

1mg = 1×10-3g

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