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25 July, 02:00

Hydrogen 3 has a half life of 12.32 years a sample of h-3 weighing 3.02 grams is left for 15.0 years what will the final weight of H-3 sample be?

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Answers (2)
  1. 25 July, 02:50
    0
    The final mass of sample is 1.3 g.

    Explanation:

    Given dа ta:

    Half life of H-3 = 12.32 years

    Amount left for 15.0 years = 3.02 g

    Final amount = ?

    Solution:

    First all we will calculate the decay constant.

    t₁/₂ = ln² / k

    t₁/₂ = 12.32 years

    12.32 y = ln² / k

    k = ln²/12.32 y

    k = 0.05626 y⁻¹

    Now we will find the original amount:

    ln (A°/A) = Kt

    ln (3.02 g / A) = 0.05626 y⁻¹ * 15.0 y

    ln (3.02 g / A) = 0.8439

    3.02 g / A = e⁰°⁸⁴³⁹

    3.02 g / A = 2.33

    A = 3.02 g / 2.33

    A = 1.3 g

    The final mass of sample is 1.3 g.
  2. 25 July, 04:09
    0
    The anwer is 1.30 in plato
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