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

1 Answer
Sep 25, 2016

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


#rho, "density" = "mass"/"volume"#

You have a 15 mL volume of metal, and so #"mass "=" "rhoxx"volume".#

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

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