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4. The half-life of F-20 is 11.0 s. If a sample initially
contains 5.00 g of F-20, how much F-20 remains after
44.0 s

Respuesta :

Eduard22sly

The amount of the F–20 that will remain after 44 s given the data from the question is 0.3125 g

Data obtained from the question

  • Half-life (t½) = 11 s
  • Original amount (N₀) = 5 g
  • Time (t) = 44 s
  • Amount remaining (N) = ?

How to determine the number of half-lives

  • Half-life (t½) = 11 s
  • Time (t) = 44 s
  • Number of half-lives (n) =?

n = t / t½

n = 44 / 11

n = 4

How to determine the amount remaining

  • Original amount (N₀) = 5 g
  • Number of half-lives (n) = 4
  • Amount remaining (N) = ?

N = N₀ / 2ⁿ

N = 5 / 2⁴

N = 5 / 16

N = 0.3125 g

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