Assorted References. 1  major reference (in celestial mechanics: Keplerâs laws of planetary motion) 2  astronomy (in physical science: Astronomy) (in astronomy: Kepler) 3  celestial mechanics (in mechanics: History) 4  discovery and formulation (in Johannes Kepler (German astronomer)) 5  geometry (in geometry: Pythagorean numbers and Platonic solids)
From Wikipedia, the free encyclopedia. In chemical kinetics, the overall rate of a reaction is often approximately determined by the slowest step, known as the rate determining step (RDS) or rate-limiting step.
NO2 + CO -----> NO + CO2. Based on the sum of the first two steps, the rate law would be: R = k[NO2][CO] This rate law does not agree with the experimentally determined rate law, R = k[NO2]^2, so you know the second step in the mechanism cannot be the slowest step.