87.5%of a radioactive substance disintegrated in 45 minutes.what will be its t 1/2
Answers
Answered by
4
Answer:
The time taken by a substance or element to become half is called its half-life.
Following formula is used to calculate half-life.
N = N0(1/2)t/half-life
Here N = Final quantity
N0 = Initial quantity
N/N0=(100-87.5)/100=12.5/100
N/N0=(1/2)^45/t 1/2
That is 125/1000=(1/2)^45/T 1/2
(1/2)^3=(1/2)^45/T 1/2
3=45/T 1/2
T1/2=45/3=15 mins
Answered by
0
Answer:
hope it will help you
Explanation:
1st Order Reaction
k=
t
2.303
log
[100−x]
[100]
k=
45
2.303
log
[12.5]
[100]
k=0.046
min
−1
Half Life =
k
0.693
=
0.046
0.693
= 14.99 min
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