Half life

Determine the half life of bismuth, when bismuth weight from the original weight of 32 g was only 2 grams in 242 minutes.

Correct result:

t =  60.5 min

Solution:

32⋅0.5242/t=2 16=2242/t ln⁡16=242/t⋅ln⁡2 ln⁡16/ln⁡2=242/t t=60.5 min

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