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The half - life of a radioisotope is four hours. If the initial mass of the isotope was 200 ~g , the mass remaining after 24 hours undecayed is

Options

  1. A1.042 ~g
  2. B4.167 ~g
  3. C3.125 ~g
  4. D2.084 ~g

Correct answer

C. 3.125 ~g

Step-by-step solution

2^6= 200 a-x (a-x)=3.125 gm

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