320username 320username

04-09-2019
Physics

contestada

There is a 50 g sample of Ra-229. It has a half-life of 4 minutes.
How much will be left after 12 minutes?
A. 3.13 g
B. 6.25 g
C. 12.5 g
D. 25 g

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aricgray1022 aricgray1022

04-09-2019

Answer:

6.25

Explanation:

I just finished a quiz with that same question

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nata001 nata001

04-09-2019

B. 6.25 g

Divide it by 2 every 4 minutes

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