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It has been found that sea water contains 4 x 10-8 ppm of gold. What volume of sea water in km3 must be processed to

It has been found that sea water contains 4 x 10-8 ppm of gold. What volume of sea water in km3 must be processed to produce as much gold in one year to recover 1 ton of gold? Assume a recovery of 65% for your sea water processing facility.

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