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1. |
If the density of CuO in ore ρ = 0.05It is leached with H2SO4 = 0.6MOre particle have radius r=0.5Effective diffusivity De= 6*10-6Molecular weight Mb=79.6 B=0.5Cab=0.01Calculate the time required for total leaching. |
A. | 3.8h |
B. | 4.56h |
C. | 7.87h |
D. | 9.4h |
Answer» C. 7.87h | |