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The radioactive nuclide 178 Ta undergoes first-order decay with a half-life of 9.31 min. If a...

The radioactive nuclide 178 Ta undergoes first-order decay with a half-life of 9.31 min. If a quantity of 178 Ta is produced, what fracrtion reamins after 82.5 seconds?

Please show me all steps in solving for the rate constant(k). That's really all I need.

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