問題詳情

30. If a sample of

takes 62.7 days to decrease to 20.0% of its original mass, what is itshalf-life?
(A)0.0370 days
(B) 27.0 days
(C) 157 days
(D) 195 days

參考答案

答案:B
難度:計算中-1
書單:沒有書單,新增