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Galena is the common name of a lead and sulfur mineral. 4.68 grams of galena contains...

Galena is the common name of a lead and sulfur mineral. 4.68 grams of galena contains 4.03 grams of lead. Calculate the mass % and mass fraction of both lead and sulfur in galena

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Answer #1

mass of galena PbS = 4.68g

mass of lead Pb        = 4.03g

mass of sulfur S   = mass of PbS - mass of Pb

                             = 4.68-4.03   = 0.65 g

mass percentage of Pb   in galena = 4.03*100/4.68   = 86%

mass percentage of S in galena    = 0.65*100/4.68    = 14%

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