Question

What is the mass of Cu in 3.71 x 10^3 kg of chalcopyrite?

Answer 1

CuFeS2 chalcopyrite
M(CuFeS2)= 2*63.5+55.8+32*2= 246.8 kg/kmol
3710kg*1kmol/246.8 kg= 15.0 kmol CuFeS2
in 15.0 kmol CuFeS2 is 15.0 kmol Cu
15.0 kmol Cu*63.5kg/1kmol=953 kg Cu