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20 March, 02:04

You have 320 grams of a radioactive kind of scandium. How much will be left after 132 hours if its half-life is 44 hours?

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  1. 20 March, 02:22
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    Answer: 40g

    Step-by-step explanation:

    132 hours is 3 half lives (132/44 = 3)

    3 half lives = = 0.5^3 = 1/8 = 0.125

    0.125 * 320 = 40.

    40 grams are left
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