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18 March, 08:22

A 15 gram sample of a substances thats a by product of fireworks has a k value of 0.1405

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  1. 18 March, 11:36
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    half life" is the amount of time it takes for a substance to lose 50% of it's mass so we use our formula y = a (e^kt) and plug in 7.5 for y, 15 for a, and 0.1405 for k
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