Question

After 2 hours , a radioactive substance becomes (1/32)th of the original amount . Then the half life in minute is ______ ?​

Answer 1

16 is the answer my friend

Answer 2

Answer:

24.7 min

Explanation:

k = 2.303÷time x log a/a-x

k = 2.303÷2hr x 60min

k = 2.303÷120min x log a/a/32

k = 0.0191 x log 32

k = 0.028

now we know that

T1/2 (half life) = 0.6931/k

t1/2 = 0.6931/0.028

t1/2 = 24.7 min