Physics
tamiamcarthur
2021-04-09 23:30:27
A meteorite contains 0.17 g of nickel-59, a radioisotope that decays to form cobalt-59. The meteorite also contains 5.27 g of cobalt-59. How many nickel-59 half-lives have passed since the meteorite formed?
ANSWERS
nickcook16
2021-04-10 05:53:49

total amount of nickel when meteorite was formed m_i = 0.17 +5.27 = 5.44 g number of half lives passed = n final mass of nickel m_f = 0.17 m_f = m_i/(2^n)  m_i/m_f = 2^n ln(m_i/m_f) = n ln (2) n = ln(m_1/m_f)/ln(2) number of half lives n = ln(5.44/0.17)/ln(2) = 5

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