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Question
Radium occurs only in uranium ores, typically with an observed Ra/U ratio of 1mg/3kg. Uranium ores normally contain only about 200 ppm of U. How many kilograms of uranium ore must be processed to obtain 1 mg of radium?A) 1700 kg ore
B) 15,000 kg ore
C) 6.0 108 kg ore
D) None of these
Answer
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