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10 January, 04:33

You have 2,088 grams of a radioactive kind of xenon. How much will be left after 18 hours if its half-life is 9 hours?

So idk ... 18 divied by 9 then ... idk

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  1. 10 January, 04:34
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    After 9 hours there will be 2088 / 2 = 1044 grams left

    After another 9 hours (total of 18 hours) there will be 1044 / 2

    = 522 grams left
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