If a 125 gms of radioactive element has a half life of 60 min how many half lives will it go through to become 3.90625 gms

Chemistry

1 answer:

Sonja [21]2 years ago

4 0

Answer:

Explanation:

Let the number of half lives be x

Solve this equation to find the value of x:

125*(1/2)ˣ = 3.90625
(0.5)ˣ = 3.90625 / 125
(0.5)ˣ = 0.03125
log (0.5)ˣ = log 0.03125
x = log 0.03125 / log 0.5
x = 5

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