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How long will it take for 500.0g of radium decay to 2.0g

How long will it take for 500.0g of radium decay to 2.0g
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How long will it take for 500.0g of radium decay to 2.0g

User Fomalhaut
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Therefore, the elapsed time must be triple the length of one half-life. 24.33=8.10 , so it is 8.10 hours.
User Gumenimeda
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