The images shown here depict the first-order reaction A → B at various times during the reaction process. The black circles represent reactant A, and the red circles represent product B. What is the half-life of the reaction?

(a) 30 s 

(b) 60 s 

(c) 90 s 

(d) 120 s

Transcribed Image Text:

t = 0 t = 30 s t = 60 s t = 90 s t = 120 s