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Chemistry, 26.08.2019 09:20 xbeatdroperzx

What is the half-life of sodium-25 if 1.00 gram of a 16.00-gram sample of sodium-25 remains unchanged after 237 seconds?
(1) 47.4 s (3) 79.0 s
(2) 59.3 s (4) 118 s

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What is the half-life of sodium-25 if 1.00 gram of a 16.00-gram sample of sodium-25 remains unchange...
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