Post Utme Afe Babalola University 2021 Chemistry Question 18

Practice objective / multiple choice question 18 from the 2021 Post Utme Afe Babalola University Chemistry examination.

Post Utme Afe Babalola University 2021 Chemistry Objective / Multiple Choice
Question 18 POST_UTME_AFE_BABALOLA_UNIVERSITY • 2021 • CHEMISTRY • objective

The half-life of a radioactive subs\tance is 5.0 years. If 100.0 mg of the subs\tance is initially present, what is the mass of the subs\tance remaining after 20.0 years?

Answer Options

Correct Answer A. 12.5 mg
B. 25.0 mg
C. 50.0 mg
D. 100.0 mg
Correct Answer
A
Correct Option:
12.5 mg

About This Question

This is Post Utme Afe Babalola University 2021 Chemistry Question 18. It is one of the objective questions from the 2021 Post Utme Afe Babalola University Chemistry examination.

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