Chalcopyrite (CuReS2) is the principle one of copper and the iron contained is a
ID: 959756 • Letter: C
Question
Chalcopyrite (CuReS2) is the principle one of copper and the iron contained is an important byproduct. The silver, however, is burned in oxygen to produce suffer dioxide, an environmental pollutant.
1.) Calculate the number of grams of copper contained in 30.0 kilograms of pure chalcopyrite.
2.) At $0.03 per gram for iron, how much would the iron extracted from the same 30 kilograms of chalcopyrite be worth?
3.) How many grams of silver dioxide will be produced during the conversion of 30.0 kilograms of chalcopyrite one to metallic copper and iron?
Explanation / Answer
1 mole of CuFeS2 has 63.546 g
number of moles of CuFeS2 = 30*10^3 / 183.52 = 163.47
mass of Cu = 163.47 * 63.546 = 10.387 kg
mass of Fe = 163.47 * 55.845 = 9.128 kg
1 g of Fe worth 0.03 dollar
9.128 * 10^3 g of Fe worth 0.03 * 9.128 * 10^3 = 273.84 dollars