A) 12g
B) 36g
C) 48g
D) 24g
Correct Answer: C
Solution :
Given\[{{t}_{1/2}}=3\] Total time T= 12 No. of half lives \[(n)=\frac{12}{3}=4\] \[{{\left( \frac{1}{2} \right)}^{n}}=\frac{N}{{{N}_{o}}}\]\[\therefore \] \[{{\left( \frac{1}{2} \right)}^{4}}=\frac{3}{N}\] \[\frac{3}{N}=\frac{1}{16}\] \[N=48g\]You need to login to perform this action.
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