1,赤铁矿石化学式Fe2O3,5000t×76%=3800t 3800t×(112÷160)=2660t纯生铁 98%生铁2660t÷98%≈2714t
2,Mg+2HCl=MgCl2+H2
24 72 2
Zn+2HCl=ZnCl2+H2
65 72 2
Fe+2HCl=FeCl2+H2
56 72 2
30克Mg:24÷30g=2÷x x=2.5g
30克Zn:65÷30g=2÷x x≈0.9g
30克Fe:56÷30g=2÷x x≈1g x表示氢气
Mg生成30gH2 2÷30g=24÷x x=360g
Zn生成30gH2 2÷30g=65÷x x=975g
Fe生成30gH2 2÷30g=56÷x x=840g