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11 2 points SHOW YOUR WORK The half-life of Kiminium-240 is 1,280 milliseconds. How many seconds does it take for 640 g of the sample

11 2 points SHOW YOUR WORK The half-life of Kiminium-240 is 1,280 milliseconds. How many seconds does it take for 640 g of the sample to decay to 2,0g? type your answer... seconds

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