A particular reactant decomposes with a half‑life of 155 s155 s when its initial concentration is 0.396 M.0.396 M. The same reactant decomposes with a half‑life of 215 s215 s when its initial concentration is 0.285 M.0.285 M. Determine the reaction order. 1 2 0   What is the value and units of the rate constant for this reaction?

Suppose you are studying the kinetics of the reaction between nitrogen monoxide and hydrogen gas. You perform the reaction multiple times with different starting concentrations and measure the initial rate for each, resulting in this table.  Experiment     [NO] (M)   [H2] (M)  Initial Rate (M/s) 1 0.0050 0.0020 1.25 x 10–5 2 0.010 0.0020 5.00 x 10–5 3 0.0050 0.0040 2.50 x 10–5   Based on the data, choose the correct exponents to complete the rate law.   rate=k[NO]x[H2]y   x=? y=?

A particular reactant decomposes with a half‑life of 173 s when its initial concentration is 0.301 M. The same reactant decomposes with a half‑life of 231  s when its initial concentration is 0.225 M. Determine the reaction order. 2, 1, or 0   What is the value and units of the rate constant for this reaction? k= ? units= ?

49. The thermal decomposition of acetaldehyde, CH,CHO-CH+CO is a cond-onder reaction. The following data were obtained at 518°C. time, s Pressure CHICHO, mmHg 0 Chapter 13: Chemical Kinetics 364 330 290 132 Based on the data given, what is the half-life for the disappearance of acetaldehyde? A) 1.5 x 10's B) 410 s C) 5.4 x 10's D) 520s E) 305 s Category: Difficult Section: 13.3 42 105 720