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2. (5 marks) The radioactive isotope sodium-24 is used as a tracer to measure the rate of flow in an artery or vein. The half-life

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2. (5 marks) The radioactive isotope sodium-24 is used as a tracer to measure the rate of flow in an artery or vein. The half-life of sodium-24 is 14.9 hours. Suppose that a hospital buys a 40g sample of sodium-24 (a) How much of the sample will remain after 48 hours? (b) How long will it be until only 1 gram remains

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