Question

The half life of sr is 9.70 hours.what is decay constant

Answer 1

Answer -

• The half-life of strontium-91, 91/38 Sr is 9.70 h. Find (a) its decay constant and (b) for an initial 1.00-g sample, the activity after 15 hours

Hope it will help you

Answer 2

Explanation:

the correct answer is1.98×10^-5s^-1.

if if we talked about the answer in seconds can we know that 9.70 hour is equal to 34920s according to the formula given below

decay constant= 0.693/Half life

so we can divide the 0.693 with the time in second which is 34920 thus we concluded that from this correct answer will

1.98×10^-5per second.