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)
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?
WebAssign will check your answer for the correct number of significant figures. kg
1 answer