The rock in a lead ore deposit contains 84% PbS by mass. How many kilograms of the rock must be processed to obtain 2.3 kg of Pb?

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1 answer

massPb=Percent ore * percentleadinPbS *massore

so what is the percent of lead in the PbS
= 207/(207+32)= you do it.

mass ore needed=2.3kg/(.84*percentleadinPbS)