The decay constant for strontium-90 is 0.0247 y-1 .How many grams of strontium-90 remain if 10.0 g decay for exactly 60 years?
A) 0.23 g
B) 0.33 g
C) 1.48 g
D) 2.27 g
E) 7.71 g
Correct Answer:
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