Given a volume of mercury metal, how do I find its molar quantity?

1 Answer
anor277
Sep 25, 2016

You need to find (i) the mass of the sample, and (ii) convert this mass into a molar quantity.

Explanation:

ρ,density=massvolume

You have a 15 mL volume of metal, and so mass = ρ×volume.

And then you divide this mass by the molar mass of mercury to get an answer in moles: moles=massmolar mass.

The number of moles corresponds to a precise numerical quantity of mercury atoms. You need to use Avogadro's number.

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