The half-life of is 0.1452 years. The surface of the Earth gets frequently bombarded by this isotope...

The half-life of is 0.1452 years. The surface of the Earth gets frequently bombarded by this isotope which is generated in the atmosphere. In an oleander twig, is observed to decay at a 350 decays/s decay rate.
(a) How long will it take until the decay rate drops to 25 decays/s?
(b) What is the initial mass of present on the oleander twig?

Molar mass of is 7.017 g/mol.

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genius_generous answered 1 year ago

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