A zero order reaction starts at 0.8 mol/L with k = 0.02 mol L^-1 s^-1. When is the reactant used up?
A16 s
B40 s
C4 s
D400 s
Answer & Solution
Correct answer: B. 40 s
For zero order [R] = [R]0 - kt, so complete use needs t = 0.8/0.02 = 40 s.
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