A) \[5.78\times {{10}^{4}}\]years
B) \[9.85\times {{10}^{4}}\]years
C) \[7.85\times {{10}^{3}}\]years
D) \[0.85\times {{10}^{4}}\]years
Correct Answer: C
Solution :
\[t=\frac{2.303}{0.693}\times 5000\times \log \frac{15}{5}\] \[=\frac{2.303}{0.693}\times 5000\times \log 3=7927=7.92\times {{10}^{3}}yrs\text{.}\]You need to login to perform this action.
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