The Half-Life of Cobalt-60 Is 5

question 53

Multiple Choice

The half-life of cobalt-60 is 5.20 y. How many milligrams of a 6.000-mg sample remain after 10.5 years?

• A) 5.75 mg
• B) 24.3 mg
• C) 0.0543 mg
• D) 0.123 mg
• E) 1.48 mg

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