What are the order of the reaction and the rate constant for the reaction based on the gathered data at 250 °C?
SCN^- → NCS^-
Time [SCN^-]
0       1.00
5      0.861
10     0.741
15     0.638
20     0.549
25     0.472

• A. Zeroth order, 9.67x10^-3 M/s
• B. First order, 3.00x10^-2 M/s
• C. Second order, 1.69x10^-2 M/s

Answer: (B)