ksymone6343 ksymone6343

31-08-2017
Chemistry

contestada

The half-life of radioactive element krypton-91 is 10 seconds. if 16 grams of krypton-91 are initially present, how many grams are present after 10 seconds? after 50 seconds?

Respuesta :

TheProfessor4zzzFM TheProfessor4zzzFM

07-09-2017

10 seconds = 8grams
then just divide by 2 another 4 times...
= 0.5grams after 50 seconds

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