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  • 3 years ago

If a 12.0g sample of Radon-222 decays so that after 19 days only 0.375g remains, what is the half-life of Radon-222?

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  1. zaphod
    • 3 years ago
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    12--->6--->3--->1.5--->0.75--->0.375 19days/5----> ?

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