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How much of a 500g sample of potassium-42 is left after 37.2 hours if the half-life of potassium-42 is 12.4 hours

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Answer:

15.625 g of a 500 gram sample of potassium-42 with 12.4 hours of Half -life is left after 62 hours.

The half-life is the time after which half of the initial quantity of a radioactive substance is left .

Given here,

The half-life of K-42 = 12.4 hours

The initial quantity of K-42 = 500 gm

The final quantity after 62 hours = ?

The number of half cycle

Thus the number of half life cycles in 62 hours is 5,

After 1 half life

After 2 half lives

After 3 half lives

After 4 half lives

After 5 half lives

15.625 g of a 500 gram sample of potassium-42 with 12.4 hours of Half -life is left after 62 hours.

To know more about Half life,

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