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The reactant concentration in a zero-order reaction was 5.00×10−2 M after 175 s and 2.00×10−2 M...

The reactant concentration in a zero-order reaction was 5.00×10−2 M after 175 s and 2.00×10−2 M after 340 s . What is the rate constant for this reaction? Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash.

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