Posted: March 2nd, 2017

If the lead can be extracted with 92.5% efficiency, what mass of ore is required to make a lead sphere with a 4.00 cm radius?

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with 92.5% efficiency, what mass of ore is required to make a lead sphere with a 4.00 cm radius?