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Working with Percentages Pitchblende is an ore that contains the element uranium. A source of pitchblende is known to contain 67% uranium by mass. How

Working with Percentages Pitchblende is an ore that contains the element uranium. A source of pitchblende is known to contain 67% uranium by mass. How many kilograms (kg) of pitchblende are needed to obtain 118 kg of uranium? Please round your answer to the nearest whole number.

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