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
Correct Answer:
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