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It Takes 42 ∘\circ C How Long Will It Take for the Reaction to in a First-Order

Question 94

Multiple Choice

It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25 ∘\circ C. How long will it take for the reaction to be 90% complete


A) 13.0 min
B) 86.0 min
C) 137 min
D) 222 min
E) 284 min

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