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08-10-2022
Chemistry

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PLEASE ANSWER THIS! i need help w/both asap

If the half life of radium-226 is 1,600 years, how long will it take for 93.75% of a sample of radium-226 to decay?

Sodium-24 has a half life of 15 days. What fraction of the original amount of sodium-24 will remain in a sample after 105 days?

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