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On analysis, a sample of uranium was found to contain 0.277g of ""_(82)Pb^(20) and 1.667g of ""_(92)U^(238). The half-life period of ""_(92)U^(238) is 4.51xx10^(9) years. If all the lead were assumed to have come from decay of ""_(92)U^(238), what is the age of the earth? |
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