The Initial Concentration of Reactant in a First- Order Reaction

question 84

Multiple Choice

The initial concentration of reactant in a first- order reaction is 0.27 M. The rate constant for the reaction is 0.75 s^{- 1}. What is the concentration (mol/L) of reactant after 1.5 s?

• A) 1.7
• B) 2.0 × 10^{- 2}
• C) 3.8
• D) 0.135
• E) 8.8 × 10^{- 2}

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