Question- The reactant concentration in a second-order reaction was 0.300M after 255s and 8.40x10^-2M after 820s . What is the rate constant for this reaction? Express your answer with the appropriate units. Include an asterisk to indicate a compound unit with mulitplication, for example write a Newton-meter as N*m.
It is not a question in the book, so I just need the full solution of deriving!