This will be true of any product. There is a relationship between the three rates. H 2 is disappearing three times faster than N 2 by the stoichiometry. This is because NH 3 is appearing twice as fast as N 2 is disappearing. The physical state of the reactants plays a role.
Solids react rather slowly, liquids more quickly, and gases more quickly.
Finely divided solids will react with surrounding gases much more quickly than a large chunk. The chemical nature of the reactants affects rate. For example, all the alkali metals react with water. The nature of Cesium is that it will react much faster than Lithium. Generally, reactions occurs much faster at higher temperature.