Question

Below is the four-step process to convert CuFeS2 to the copper (Cu) used for pennies 2CuFeS2 + 302 20US +2FcO+250 2Fc+2SiO2 2FeSio 2Cus Cuss Cu,S+S+20, —2Cu +2502 For every penny that is made, 3.000 grams of copper are required. Below is the setup of conversion factors to determine how much CuFeS2 is required to produce 1000 pennies 3000 g Cux 1 mol Ct, 8 "B"mel Cus 2 mol CuFeS 185.52 Ofes, ACH 1 mol cas 2 mol CS 1 mol Cues, -"XCufes olu What value should go in the place indicated by the letter A? g Cu Part 2 (0.3 point) See What value should go in the place indicated by the letter B? mol Cus Part 3 (0.3 point) See Use the complete setup to calculate how many grams of Cures are required to produce 100 copper penniesie 300.0 g Cu). g CuFeS

Answer 1

from, eqn (1) mol of Cu: mole of Cus = 2:1 so, mole of Cugs = /2 = 0.5 mol equ. (3) mole of Cups: mole of lus = 1:2 mole of aus 20.5*2= 1 mote Now mole of Cus: mote Cu Fesz z1: 1 so If we see the given oqu. we can find that for the require ment of Imole of copper, the amount of copper required is 63.65 g. smole of Curs = 2 mole of Cus. - u So, the equi contains A" has the value = 63.559. "B" has u = 2 mote Cus! Now, we put the value of and Bh on the left ciate of the given son (motofluns 2 molstars 2 mol of lates, 300.00* 63.55 ronoloftu Imoleftis amolo tas 183 52 got cute S2 I mot of buses, 300.0g x 2 x 2 x 183.52 of Cutes 63.55 x 2x2 1 motofly 63 55g of lu & Notes: 2 866.34 g. og

52 24 25 26 27 28 29 30 Se x2 866.349 Now A = 63.5 63.55g. of Can. B2 2 moles of CuS, x = 866 34 g. of Cutes required for 100 pennies of Coppen.