in seawater in terms of the conditional stability constants of metal complexes and the corresponding ligand concentration. Based on the conditional stability constants of organic Cu(II) complexes,
In the original version of the metric system the base units could be derived from a specified length (the metre) and the weight [mass] of a specified volume ( 1â7003100000000000000â 1000 of a cubic metre) of pure water.
The length measurement was introduced to measure distance between any two objects. The base metric (SI) measurement unit of length is a meter. The meter is defined as the distance traveled by light in vacuum during 1/299 792 458 of a second.