A Certain First-Order Reaction A $\rarr$ B Is 25% Complete in 42 Min at 25

question 14

Multiple Choice

A certain first-order reaction A $\rarr$ B is 25% complete in 42 min at 25 ^$\circ$ C. What is the half-life of the reaction

• A) 21 min
• B) 42 min
• C) 84 min
• D) 20 min
• E) 101 min

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