Question: How many times richer is copper ore of (a) 5 percent copper, compared to the average crustal abundance of 0.0058 percent and of (b) 0.25

How many times richer is copper ore of (a) 5 percent copper, compared to the average crustal abundance of 0.0058 percent and of (b) 0.25 percent copper, the lowest grade mined?

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a 862 times b 43 times To get these an... View full answer

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