阿摩線上測驗
29. The decay of strontium-90 follows a first-order process and the rate constant is 0.02406 year−1 . How much of 2 mg sample of strontium-90 remains after 144 years?
(A) 0.250 mg
(B) 0.062 mg
(C) 0.031 mg
(D) 0.125 mg
(E) 0.500 mg
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統計： A(7), B(55), C(7), D(4), E(2) #2356345
統計： A(7), B(55), C(7), D(4), E(2) #2356345
