prettygirl78981 prettygirl78981

24-01-2024
Physics

contestada

The half-life of a certain substance is 3.6 days. How long will it take for 20 g of the substance to decay to 7 g?
a) 1.8 days
b) 2.4 days
c) 4.5 days
d) 6.3 days

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