1.A sample of radioactive material has mass mmm, decay constant λ\lambdaλ, and molar mass MMM. Avogadro constant is NAN_ANA. The initial activity of the sample isa.λmM\dfrac{\lambda m}{M}Mλmb.Mλm\dfrac{M}{\lambda m}λmMc.λmNAM\dfrac{\lambda m N_A}{M}MλmNAd.mNAλtM\dfrac{m N_A \lambda t}{M}MmNAλtLogin to continueOnly logged in users canattempt or see the solution.
