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17 March, 07:45

7. Lawrencium has a half-life of 3.00 minutes. I started with a 100.0 g sample. After 45.0 minutes how

much of my sample remains Lawrencium?

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  1. 17 March, 08:11
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    N=3.05*10^-3g

    Explanation:

    Using Ln (No/N) = 0.693/t½*t

    Ln (No/N) = 0.693/3*45

    No/N=exp (10.396)

    100/exp (10.396) = N

    100/32695.7=N

    N=3.05*10^-3g
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