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Alex
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how many mercury atoms ...

Resolved Question:

how many mercury atoms would there be in a 100 gram piece of swordfish said to contain 0.1 ppm by weight of mercury?
Submitted: 10 years ago.
Category: General
Expert:  Alex replied 10 years ago.

Hello and welcome to JA!

It is not clear from your question if this is for a chemistry class or just for your own information. For a chemistry class, the solution can be written like this:

Explanation: 0.1 ppm by weight means that there is 0.1 gram of mercury (Hg) in 1 million (or 106) grams of fish. From the periodic table we find that one mole of mercury weighs 200.6 grams (this is the same value in grams as the atomic mass of mercury ). Finally, there are 6.02 × 1023 (Avogadro's number) atoms in one mole.

Please write back if you need more help with this question.

 

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