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If a 100 gram sample of radon has decayed to 12.5 grams how many half-lives have passed?
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Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?
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If a 100 gram sample of radon has decayed to 12.5 grams how many half-lives have passed?...
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