The half-life of Co-60 is 5.3 years. If the initial mass of the sample is 1000g, how much will remain after 26.5 years.

Question

The half-life of Co-60 is 5.3 years. If the initial mass of the sample is 1000g, how much will remain after 26.5 years.

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Minh Khuê 4 years 2021-08-14T18:45:35+00:00 2 Answers 15 views 0

Answers ( )

  1. thienan
    0
    2021-08-14T18:46:40+00:00
    Reply

    Answer:

    31.25

    Explanation:

    The half life is 5.3 years

    This means that 1.2 of the orginal matter is left after every 5.3 years.

    To find this, divide 26.5(total years) by 5.3(hald life)

    This gets you 5.

    This is how many times half life occurs, or how many times the total mass is split in half.

    This can be though of 1/2^5th power

    Or

    1/32

    Now, lets mutliply this by the 1000 total mass:

    1000*1/32

    =

    31.25g

    This is your answer!

    Hope this helps!

  2. thienthanh
    0
    2021-08-14T18:46:57+00:00
    Reply

    Heres the answer 31.25 !! I’m pretty sure

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