Radioactive decay of 212Bi is observed to be a first-order process with a half-life (t½) of 4.00 days. It is noted that a 1.70 g sample of 212Bi decays over 12 days to leave only 0.213 g behind. What is the rate constant (k) for this process? a.12.0 day–1 b.0.250 day–1 c.0.173 day–1 d.5.77 day–1 e.none of these

Given values -> Half life (t1/2)= 4.00days ->For first order reaction K =0.693/ t1/2

Answered: Radioactive decay of 212Bi is observed…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter11: Chemical Kinetics: Rates Of Reactions

Section: Chapter Questions

Problem 37QRT: Radioactive gold-198 is used in the diagnosis of liver problems. 198Au decays in a first-order...

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Radioactive decay of ²¹²Bi is observed to be a first-order process with a half-life (t_½) of 4.00 days. It is noted that a 1.70 g sample of ²¹²Bi decays over 12 days to leave only 0.213 g behind. What is the rate constant (k) for this process?

	a.	12.0 day^–1
	b.	0.250 day^–1
	c.	0.173 day^–1
	d.	5.77 day^–1
	e.	none of these

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