A Sample Contains 1

question 122

Multiple Choice

A sample contains 1.46 g of Cobalt-55.After 2.00 days,0.219 g remains.What is the half-life?

• A) 17.5 h^-1
• B) 22.6 h^-1
• C) 1.35 h^-1
• D) 0.540 h^-1
• E) 11.6 h^-1