A First Order Reaction Has a Half-Life of 30 Min

question 99

Multiple Choice

A first order reaction has a half-life of 30 min.If the initial concentration of the reactant is 0.50 M,what will the concentration of the reactant be after 2.00 hr?

• A)0.50 M
• B)0.031 M
• C)0.25 M
• D)The concentration cannot be determined without the rate constant.

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