Question
Science task 90: A Northern Territory senior class applies the information to a remote-services, climate or community investigation. A tracer starts at 0.22 mol and undergoes 2 half-lives of 3 minutes each. How much remains?
Select an option. Your answer will be checked instantly.
Correct Answer: D. 0.055
Explanation:
After 2 half-lives, amount=0.22/2^2=0.055.
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