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12-03-2024
Chemistry

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The radioactivity from a sample of Na24CO₃ was measured by noting the time required for the count of disintegrations. What is the half-life of Na24CO₃ if 2.26 g initially present reduces to 1.13 g?
a) 15 hours
b) 20 hours
c) 30 hours
d) 45 hours

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