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Potassium has a half-life of 12 hours. What fraction of a 100 g sample is left after 48 hours? A) 1/2 B) 1/4 C) 1/16 D) 1/8
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26 votes
26 votes
Potassium has a half-life of 12 hours. What fraction of a 100 g sample is left after 48 hours?

A) 1/2
B) 1/4
C) 1/16
D) 1/8

User Douglas Frari
by
3.0k points

1 Answer

17 votes
17 votes

Answer:

D: 1/8

Step-by-step explanation:

Having a half life of 12 hours means that it shrinks by 1/2 every 12 hours. 48 is 3*12, so we can conclude that there will be (1/2)^3 times of the sample left after the time is over. This is 1/8, which is why D is our answer.

User Rohit Das
by
2.2k points
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