A 500 mg sample of an unknown radioactive substance was, Chemistry

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A 500 mg sample of an unknown radioactive substance was

A 50.0 mg sample of an unknown radioactive substance was placed in storage as well as its mass measured periodically. After 51.9 days, the amount of radioactive substance had decreased to 3.13mg. Explain what is the half life of the unknown radioactive substance?

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Chemistry: A 500 mg sample of an unknown radioactive substance was

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Chemistry: A 500 mg sample of an unknown radioactive substance was

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