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Approximately what fraction of an original Co-60 sample remains after 21 years?
Wiki User
∙ 13y ago
Half-life is 5.27 years; 21 / 5.27 = 3.99, or almos 4 half-lives; (1/2)4 = 1/16.
Wiki User
∙ 13y ago
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What fraction of an original 20.00gram sample of nitrogen-16 remains unchanged after 36.0 seconds?
2
What fraction of a sample of N 16 remains undecayed after 43.2 seconds?
1.5% remains after 43.2 seconds.
What is the total number of years that must pass before only 25.00 grams of an original 100.0 gram sample of c-14 remains unchanged?
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One eighth remains.
What fraction of an original 20.00gram sample of nitrogen-16 remains unchanged after 36.0 seconds?
2
Which fraction of an original 20.00-gram sample of nitrogen-16 remains unchanged after 36.0 seconds?
1/32
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It tells what fraction of a radioactive sample remains after a certain length of time.
What fraction of a sample remains after three half lives?
An eighth remains.
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This fraction is 12,5 %.
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1.5% remains after 43.2 seconds.
What fraction of a radioactive sample remains after three half - life?
It is 1/8 .
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Enrichment=specific activity of fraction/original specific activity of original sample
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