Fe2O3 + 3 CO ===高温=== 2Fe + 3CO2
160_________________________112
x+___________________________0.7x
CuO + CO ===== Cu + CO2
80________________________64
12.4-X__________________64/80(12.4-x)
则
0.7X+0.8(12.4-X)=9.3
0.1X=0.62
X=6.2
则
氧化铜的质量为12.4-6.2=6.2
所以
之比=1:1