Answer: 3.91x10²² atoms Hg
Explanation: For a single mole of Hg it is equal to the Avogadro's Number or 6.022x10²³ atoms Hg.
0.065 mole Hg x 6.022x10²³ atoms Hg / 1 mole Hg
= 3.91x10²² atoms Hg
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