Answer to Question #258510 in General Chemistry for james

General Chemistry

Question #258510

The half-life of strontium-91, 91

38Sr is 9.70 h. Find

(a) its decay constant, and

(b) for an initial 1.00-g sample, the activity after 15 hours.

Expert's answer

= 91×9.7/38= 23.23

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