Question: A 1 0 0 - g sample o f a n isotope o f sodium, ? ( 2 4 ) N a , decays t

A100-g sample ofan isotope of sodium, ?(24)Na, decays to30g after 26 hours.
(a) Find the half-life of the isotope. (Round your answer to two decimal places.)
hours
(b) How much of the sample remains after two hours? (Round your answer to two decimal places.)
g
(c) How long will it take for only 4gof the sample to remain? (Round your answer to two decimal places.)
hours
A 1 0 0 - g sample o f a n isotope o f sodium, ?

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