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26-04-2017
Chemistry

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A radioactive isotope X has a half-life of 36 years. How much X would remain after 108 years, if we started with 500 grams? A. 250 gram B. 0.500 grams C. 62.5 grams D. 125 grams

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27-04-2017

C. 62.5 I guess lol I hate chemistry

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