Answer Happy

The reactant concentration in a zero-order reaction was 6.00×10−2M after 165 s and 1.00×10−2M after 345 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.
The reactant concentration in a first-order reaction was 9.00×10−2M after 10.0 s and 6.20×10−3M after 95.0 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.
The reactant concentration in a second-order reaction was 0.430M after 175 s and 1.70×10−2M after 865 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.