General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

We use stoichiometry to obtain: a) $50.0 kg\times(20. mcCi\div1 kg)\times(1 mCi\div1000 mcCi)$ = 1 mCi technetium-99m b) mrem = mrad x factor, where the factor is based on the type of radiation. The factor for alpha radiation is 20. $50 mrad\times20$ = 1000 mrem