Radioactive decay is a first order reaction. The specific rate constant,k, for radioactive decay of beryllium–11 is 0.0495 s–1. What mass of a 0.500 mg sample of beryllium–11 remains after 28 seconds? A.0.250 mg B.0.125 mg C.0.0625 mg D.0.375 mg E.0.500 mg

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