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20 May, 09:55

Technetium-104 has a half life of 18.0 minutes. how much of a 165.0 g sample remains after 90.0 minutes?

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Answers (2)
  1. 20 May, 10:15
    0
    The mass of 165.0 g sample that remains after 90.0 minutes is 5.16 grams

    calculation

    lambda㏑2/18 = 0.0385

    m (t) = 165 x e (0.0385 x90) = 5.16g
  2. 20 May, 10:19
    0
    The mass of 165.0 g sample that remains after 90.0 minutes is 5.16 grams

    calculation

    lambda㏑2/18 = 0.0385

    m (t) = 165 x e (0.0385 x90) = 5.16g
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