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Manganese-56 is a beta emitter with a half-life of 2.6 h. what is the mass of manganese-56 in a 1.0-mg sample of the isotope at the end of 10.4 h?
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Manganese-56 is a beta emitter with a half-life of 2.6 h. what is the mass of manganese-56 in a 1.0-mg sample of the isotope at the end of 10.4 h?
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Dec 21, 2018
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Manganese-56 is a beta emitter with a half-life of 2.6 h. what is the mass of manganese-56 in a 1.0-mg sample of the isotope at the end of 10.4 h?
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Quantumplation
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Answer: 0.0625
Step-by-step explanation:
Yordan
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Dec 22, 2018
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Yordan
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The mass at time may be expressed by
where
m₀ = the original mass
k = decay constant
t = time, hours
Because the half-life is 2.6 h, therefore
Since m₀ = 1.0 mg, the mass after 10.4 hours is
Answer: 0.0625 mg
Shawnwall
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Dec 26, 2018
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