(Solved): The radioactive source 99Tc is used in medicine to treat and diagnose patients. The half-life of t ...

The radioactive source $${}^{99}\mathrm{Tc}$$ is used in medicine to treat and diagnose patients. The half-life of this source is $$6.05\mathrm{h}$$. The activity of a drug $$(\mathrm{slg})$$ that was prepared for a patient is $$1.3\mathrm{Ci}$$. The mass (in micrograms) of the radioactive $${}^{99}\mathrm{Tc}$$ source contained in the drug is approximately: (Recall that $$1\mathrm{Ci}=3.7\times 10^{10}\mathrm{Bq}$$ and $${\mathrm{N}}_{\mathrm{A}}=6.022\times 10^{23}$$ ) $$0.25$$ $$9.10$$ $$2.5$$ $$0.59$$ $$2.15$$