If the concentration of gold in seawater is 2.0 milligram per ton of sea water and the mass of the ocean is 1.5 × 1018 tons, how much gold is in the ocean?

A. 3,000 lb
B. 300 g
C. 36 mg
D. 3.0 × 1012 kg
E. 3.0 kg


Answer: D

Environmental & Atmospheric Sciences

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