I just need help with the \"what are the units of the rate constant for a second

Question

I just need help with the "what are the units of the rate constant for a second order reaction?" question and the "What is it he half-life for a first order reaction with k= -.1454 1/min?" question

Nitrous oxide, N20, undergoes decomposition on a gold surface at 900 oC, obeying the following stoichiometry: 2 2 (g) 2 N +O 2 (g 2 (g) The concentration of the reactant was monitored as a function of time. A graph of ln(Noo) vs. tgave a graph simlilar to the one in the lab manual. The trendline is Y -0.01283 X -2.749, with a y axis of In(N2O) and x of time. The correlation coefficient r is -0.9993, for a nearly perfect anticorrelation. What is the numerical value of the rate constant, k? Answer: Save my answers What is the reaction order according to the above results? Select one: A. First order B. Second order C. Zero order D. Unable to determine from the given data

Explanation / Answer

Unit of rate constant for a second order = 1/(M*min)

t1/2 for first order reaction = 0.693/k = 0.693/0.14541= 4.76 min

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