Chemistry, 03.12.2021 03:30 brooke7768

A 281.5 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 35.19 ng. How many half-lives of the unknown radioactive substance
have occurred?

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A 281.5 ng sample of an unknown radioactive substance was placed in storage and its mass measured pe...

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A 281.5 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 35.19 ng. How many half-lives of the unknown radioactive substance have occurred?

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Another question on Chemistry

A 281.5 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 35.19 ng. How many half-lives of the unknown radioactive substance
have occurred?