Question

Calculeaza masa de zinc care se obtine prin reactia dintre carbon si 1620Kg Oxid de zinc cu 20% impuritati

Answer 1

Notez inmultirile cu * si fractiile cu / 
ZnO + C - > CO2 + 2 Zn 

M ZnO - > 65 +16 = 81 
1 kmol ZnO = 81 kg
M Zn = 65 
1 kmol Zn = 65 kg 
 
p = mp*100/mip = > mp = p *mip /100 = 80 *1620 /100 = 1296 kg  

In 2 * 81 kg ZnO avem 1296 kg Zn 
In 2 * 65 kg ZnO avem     x kg     Zn 

2*81/2*65=1296/x = > x= 2 * 65 *1296 / 2 * 81 = 1040 kg Zn