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Table 1 shows the composition of Nkana concentrate. Please use the information in this table to answer the following questions: A. Calculate the percentage

Table 1 shows the composition of Nkana concentrate. Please use the information in this table to answer the following questions: A. Calculate the percentage of; (a) Cu2S, (b) CuCo2S4 and FeS2 minerals assuming that all cobalt exist in CuCo2S4 mineral and iron in the FeS2 mineral [9 marks] B. Determine the amount of air required if the off-gas is to contain 4% oxygen? [10 marks] Table 1- Chemical analysis of Nkana concentrate %Cu %Co %S %Fe 12.2 2.8 29.5 10.4

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