radon-222 has a half life of 3.82 days. how much of a 100-g sample of radon-222 will remain unchanged after 7.64 days A.100 g B.50 g C. 75 g D. 25 g
Chemistry · Middle School · Mon Jan 18 2021
llm
Answered on
Given the statement:
Radon-222 has a half life of 3.82 days.
Determine how much of a 100-g sample of radon-222 will remain unchanged after 7.64 days
Solution:
To determine the answer, we first divide 7.64 days by 3.82.
= 7.62 / 3.82
= 2
Now we need to divide 100 by 2.
= 100 / 2
= 50 g
Final answer:
B. 50 g