A Second-Order Reaction Starts with an Initial Concentration of 0

question 30

Multiple Choice

A second-order reaction starts with an initial concentration of 0.100 mol/L of the reactant.If the rate constant is 1.4 × 10^-2 L/mol·s,what is the time required to decrease the initial concentration to 0.050 mol/L? 2A → B
Rate = k[A]²

• A) 710 s
• B) 1100 s
• C) 49.5 s
• D) 3.57 s
• E) 2100 s

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