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.

If the density of CuO in ore ρ = 0.05It is leached with H2SO4 = 0.6M

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

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